TheBlackPurple
Mass & Slim High-Waisted Anti-Cellulite Compression Leggings - Black
Mass & Slim Compression Leggings (Black)
Black anti-cellulite compression leggings: order one size up
Here's the honest part first. These are firm compression leggings, made to be worn on their own, out of the house, with nothing over them. They feel snug when you first put them on, and that's on purpose. Order one full size up, give them a few wears, and the fabric molds to the shape of your body.
Your size: one full size up
Why size up? These are true compression leggings, and compression is made to fit snug. If you're not used to wearing compression, that can feel tight at first. That's why we suggest you size up one full size from your usual U.S. size. They're also firmer than our grey shapewear.
| Your usual size | Order this size |
|---|---|
| SmallUS 6 / 8 | MediumUS 10 / 12 |
| MediumUS 10 / 12 | LargeUS 14 / 16 |
| LargeUS 14 / 16 | Extra LargeUS 18 / 20 |
| Extra LargeUS 18 / 20 | Check the chartExtra Large is our largest size |
Usual size Extra Large? It's our biggest size, so use the size chart below to pick by your hip and waist. Not sure of your size? Same chart. Size exchanges are free.
Snug at first is a feature
That tight feeling is the fabric doing its job. It stretches and molds to the shape of your body after a few wears, and then it just feels like yours.
The fit"They fit really snug. But not unbearably so."
Heather W.
Stretches out"I bought more because the ad said they stretch out. My other pairs are 2 years old."
Shawn L.
- 60-day full refund, even if worn
- Free size exchanges
- Free U.S. shipping, 3 to 4 business days
Size Chart and Fit Guide for black compression leggings
One size chart for the whole Mass & Slim collection, based on standard women's U.S. sizing.
← Swipe to see the full chart →
| Size | US Size | Hip | Waist | Height | Weight (approx.) |
|---|---|---|---|---|---|
| Small | 6 / 8 | 36 to 38" | 26 to 28" | 4'11" to 5'6" | 115 to 135 lbs |
| Medium | 10 / 12 | 39 to 41" | 29 to 31" | 5'2" to 5'8" | 135 to 160 lbs |
| Large | 14 / 16 | 42 to 44" | 32 to 34" | 5'4" to 6'0" | 160 to 185 lbs |
| Extra Large | 18 / 20 | 45 to 47" | 35 to 37" | 5'5" to 6'2" | 185 to 215 lbs |
Black Compression Leggings (you're here): As the name says, these are true compression leggings worn as outerwear, so they fit firmer and feel snug. Size up one full size from your usual U.S. size. Tip: if you wear a Medium in our grey Mass & Slim shapewear, order a Large in the black compression leggings. The compression fabric fits more snugly, while the grey shapewear has more stretch so it sits comfortably under your clothes.
Grey Shapewear (Shorts, Leggings, Waist Shaper): Order your true U.S. size. Size up only if you're between two sizes. For example, if you're between a Medium and a Large, go with the Large.
Wrong size? Exchanges are free. If your first pair isn't quite right, we'll help you find the perfect size.
Wrong size"I ordered the wrong size and they were quick to send me my correct size! Excellent customer service!"
Summer, verified buyer
How to put them on
They're easy to put on with the right technique. Here's the easiest way.
- Start with gentle hands. Keep sharp nails away from the fabric.
- Roll the top inside out. Fold the waistband down so the top part of the leggings is turned inside out.
- Put in each leg. Step in one leg at a time and ease them up over your calves and knees.
- Roll it up over your hips and thighs. Once you get to your thighs, roll the top back over and up into place at your waist, smoothing as you go.
- Give them a few wears. The fabric stretches and molds to the shape of your body, so they feel more like yours every time.
Fully opaque, squat-proof, and made to be worn on their own
These black anti-cellulite compression leggings are made to be worn on their own as outerwear. The premium black fabric is:
- Completely opaque
- Squat-proof
- No see-through
- Gym-ready
You can wear them out the door and not think about it. They look like high-end fashion leggings while quietly doing the work of anti-cellulite compression.
Tap below to watch Tanya in an XL and another customer in a Medium.
See Mass & Slim Compression Leggings in Action
Tanya is wearing size XL
Customer wearing size Medium
A waistband that stays put, and comfort for a long day
The waistband
The high waistband smooths your midsection and stays put all day. No rolling, no sliding, no constant tugging. Just a sleek, sculpted shape that stays comfortable through workouts, errands, and everything in between.
The waistband"These leggings are very comfortable, the waist band does not roll down, the compression is just right."
Cheryl I.
Cool, breathable, and made for long days on your feet
Made with a breathable, lightweight smart textile, the fabric has a cool feel against your skin, so even during a workout or a long day on your feet, these leggings help keep you comfortable instead of hot. Soft, flexible, and moisture-wicking, with strong compression support that lasts. Many women wear theirs 8 to 12 hours a day.
End of the day"After wearing them for a full day, I felt a major difference. My legs didn't feel half as heavy as usual by the end of the day."
Heather W.
How to wear them: gym, errands, or out for the day
Wear your black anti-cellulite compression leggings on their own. Put them on and go.
- At the gym. Squat-proof and gym-ready.
- Running errands. The high waistband stays put, with no constant tugging.
- Out for the day. They look like high-end fashion leggings.
- Travel days. Breathable cooling comfort for errands, travel and workouts.
For the best results
- Wear the leggings about 8 hours a day, for at least 30 days.
- As you move, the Tourmaline® beads create a gentle micro-massage.
- Over time, that steady massage helps support circulation and smoother-looking skin.
Supportive Compression. Sculpted Confidence. Smoother-Looking Legs in 30 Days.
You're wondering if they work. Fair question, so here's the plain answer.
Mass & Slim Compression Leggings combine supportive, sculpting compression with Tourmaline® micro-massage technology to shape your figure, support circulation, and smooth the look of cellulite over time. They're high-waisted, fully opaque, and squat-proof, made to be worn on their own at the gym, running errands, or anywhere you want smoother, more sculpted legs.
Most compression leggings just squeeze. Mass & Slim works with you as you move, giving you instant shaping now and gradual results with regular wear.
- Helps smooth the appearance of cellulite
- Lifts and shapes the buttocks for a rounder, more sculpted look
- Supports healthy blood and lymph flow
- Firm, high-waisted compression that shapes you from waist to ankle
- Breathable, cooling fabric that keeps you comfortable, not hot
- Fully opaque and squat-proof outerwear
- Made for 8 to 12 hours of daily wear
Held in"These are absolutely heavenly! They hold you in and seems to be diminishing the cellulite a bit. Love them!"
Janis K.
Sculpting compression that lifts and shapes
These give you firmer compression than our grey shapewear line, with a supportive, tummy-control hold that lifts your buttocks and shapes your waist, hips, thighs, and calves. The result is a smooth, confident silhouette that looks as good as it feels. You feel held in, and you can leave the house in leggings on their own.
Anti-cellulite support technology
As you walk, move, or work out, the embedded Tourmaline® beads help support:
- Healthy blood circulation
- Lymphatic flow
- Less fluid retention
- Smoother-looking skin over time
Clinically tested. Independently verified.
In a 30-day third-party clinical study, participants who wore Mass & Slim 8 hours a day experienced:
*Results based on Third-party clinical study: 30 women wore the shorts 8 hours a day for 30 days with a balanced diet. No control group. Individual results may vary.
What Mass & Slim means, and how the Tourmaline® micro-massage works
Mass & Slim stands for Massage and Slimming. The secret is in the fabric, a smart compression textile with hundreds of Tourmaline® beads woven right in, working against your skin to help refine your shape over time. It works in two ways:
- Right away: A firm, corset-like hold instantly sculpts and smooths your belly, buttocks, and thighs for a more defined shape that stays comfortably in place.
- Over time: With regular wear, the gentle micro-massage from the Tourmaline® beads helps improve your blood and lymph flow, which helps smooth the look of cellulite and reduce inches.
Hundreds of small Tourmaline® beads are embedded right into the fabric. As you move through your day, the rounded beads create a gentle, steady micro-massage against your skin. With regular wear, that massaging effect helps improve your blood and lymph flow over time, which helps smooth the look of cellulite and reduce inches.
Your 30-day Mass & Slim plan
Here's the month, week by week.
Weeks 1 to 2: Instant shaping and firm support. Your legs often feel more supported while you're up and moving.
Weeks 2 to 3: Your skin may start to feel smoother. Some women notice less puffiness or swelling.
Weeks 3 to 4: Many women report a smoother look to cellulite and a few inches lost.
Consistency is everything. The women who see the best results wear them regularly.
Made for women with busy lives
If you're on your feet all day, you're who we made these for. Mass & Slim Compression Leggings have become a quiet favorite for:
- Nurses and healthcare workers on long shifts
- Women who are on their feet all day
- Busy moms juggling everything at once
- Women over 45 who care about circulation and shape
- Women who want anti-cellulite leggings that fit right into their routine
- Women dealing with leg fatigue, swelling, varicose veins, lymphedema concerns, or post-workout recovery
Try them for 60 days
Slip them on. Wear them to the gym, around town, or out for the day. You'll feel the firm support and sculpted shape right away, and see the difference over 30 days as the fabric molds to your body like a second skin.
Not sure about the fit or the feel? You have a 60-day full refund, even if worn. Free size exchanges too, and free U.S. shipping in 3 to 4 business days.
60-Day Money-Back Guarantee · Free Size Exchanges · Rated 4.47/5 by Real Customers
Wearing them under clothes? Try the grey shapewear
Every Mass & Slim piece is built on the same smart compression textile with embedded Tourmaline® beads to help support circulation, lymph flow, and smoother-looking skin. The difference is how you wear them and how firm the compression feels.
Mass & Slim Shapewear (Grey). Worn UNDER Your Clothes.
Soft, stretchy, breathable shapewear made to disappear under your everyday outfits. More stretch, more flexibility, and built for 8 to 12 hours of wear at work, at home, or out and about. The grey collection smooths your stomach, lifts your buttocks, and softens the look of cellulite. Order your true size.
- Shapewear Leggings. Full-length shaping from waist to ankle. Best under pants, jeans, and longer outfits.
- Shapewear Shorts. Shapes your waist, hips, and upper thighs. Best under dresses, skirts, and shorter hemlines.
- Waist Shaper. Targeted waist and midsection support. Pairs with anything.
A lot of women own both. The black compression leggings for days they want stronger sculpting out in the open, and the grey shapewear for invisible smoothing under everyday clothes.
Fabric, care & safety
Composition: 61.3% Polyamide, 28.5% Polyester, 10.2% Spandex.
Care: Machine wash on a gentle cycle in cold water. Hang dry, or use a low temperature setting if you use a dryer.
Please wear them safely:
- Never wear them over open wounds, or on skin that's swollen, inflamed, or irritated.
- Don't wear them if you've had surgery recently or if you're pregnant.
- If you have any health concerns, check with your healthcare provider before use.
Your questions, answered
What size should I order?
Order one full size up from your usual U.S. size. Compression leggings are made to fit snug, and if you're not used to compression, that can feel tight at first. Sizing up gives you a more comfortable fit. If you wear a Medium in our grey shapewear, order a Large in these. See the size chart.
What's the easiest way to put them on?
It's all in the technique. Roll the top inside out, put in each leg, and once you get to your thighs, roll it back over your hips and up to your waist. Use gentle hands and keep sharp nails away from the fabric. After a few wears, the fabric molds to your shape. See how to put them on.
Why do the leggings feel snug at first?
That's on purpose. The firm compression fabric is meant to feel tight when it's new. After three or four wears, it relaxes and molds to your body for a personalized fit that feels like a second skin.
Are they really squat-proof and fully opaque?
Yes. The premium black fabric is fully opaque and squat-proof, with no see-through. They look like high-end fashion leggings while giving you all the benefits of anti-cellulite compression. Wear them to the gym, around town, or out for the day with full confidence.
Will the waistband roll down?
No. The high waistband stays put all day. No rolling, no sliding, no constant tugging.
Can I wear them all day?
Yes. The breathable fabric keeps you comfortable all day long, and plenty of customers wear them 8 to 12 hours daily, including during workouts. For the best results, wear them 8 hours a day for at least 30 days.
Will they make me feel hot?
Just the opposite. Mass & Slim Compression Leggings are made with a breathable fabric that has a cool feel, so you stay comfortable during workouts, long shifts, and warm days.
Do they really work?
Here's the honest answer. You get instant shaping now and gradual results with regular wear, so give them time. Wear them 8 hours a day for at least 30 days. Visible results in 30 days*.
*Results based on Third-party clinical study: 30 women wore the shorts 8 hours a day for 30 days with a balanced diet. No control group. Individual results may vary.
What if they don't fit?
Then we make it easy. You have a 60-day full refund, even if worn, and free size exchanges. If your first pair isn't quite right, we'll help you find the perfect size.
How long are they? Will they fit my height?
Choose by the size chart. The fabric is stretchy, so it adapts to your height and shape.
What's the difference between the grey shapewear and the black compression leggings?
Both use the same smart compression textile with embedded Tourmaline® beads. The difference is how firm they feel and how you wear them:
- Black Compression Leggings. Firmer compression, fully opaque, made to be worn on their own as outerwear. We recommend sizing up one full size.
- Grey Shapewear. Softer and stretchier, made to be worn under your clothes for all-day comfort. Order your true size. Take a look at the Shapewear Shorts, Shapewear Leggings, and Waist Shaper.
How do the Tourmaline beads work?
Tourmaline® beads are embedded right into the fabric. As you move, they create a gentle micro-massage against your skin. With regular wear, that massaging effect helps improve your blood and lymph flow over time, which helps smooth the appearance of cellulite and reduce inches.
Are these good for lymphedema or lipedema?
Many women with lymphedema or lipedema reach for Mass & Slim Leggings for their firm but breathable compression. The Tourmaline® beads help support lymphatic flow and ease the feeling of swelling, which makes them comfortable for all-day wear. If you have a medical condition, please check with your healthcare provider before use.
Are these good for nurses, moms, and women over 45?
Absolutely. These are some of our most loyal customers. The mix of firm sculpting compression, circulation support, and all-day comfort is exactly what women on their feet all day are looking for.
Ready to feel the difference?
Join the thousands of women across the U.S. who've made Mass & Slim Compression Leggings part of their everyday routine. Sculpting compression, real circulation support, and a confident shape that's made to be seen. Order one size up, give them a few wears, and let them become yours.
60-Day Money-Back Guarantee · Free Size Exchanges · Secure Checkout
Mass & Slim High-Waisted Anti-Cellulite Compression Leggings - Black
Top Quality Store on Google
Estimated delivery between November 08 and November 10.
Mass & Slim Compression Leggings (Black)
Black anti-cellulite compression leggings: order one size up
Here's the honest part first. These are firm compression leggings, made to be worn on their own, out of the house, with nothing over them. They feel snug when you first put them on, and that's on purpose. Order one full size up, give them a few wears, and the fabric molds to the shape of your body.
Your size: one full size up
Why size up? These are true compression leggings, and compression is made to fit snug. If you're not used to wearing compression, that can feel tight at first. That's why we suggest you size up one full size from your usual U.S. size. They're also firmer than our grey shapewear.
| Your usual size | Order this size |
|---|---|
| SmallUS 6 / 8 | MediumUS 10 / 12 |
| MediumUS 10 / 12 | LargeUS 14 / 16 |
| LargeUS 14 / 16 | Extra LargeUS 18 / 20 |
| Extra LargeUS 18 / 20 | Check the chartExtra Large is our largest size |
Usual size Extra Large? It's our biggest size, so use the size chart below to pick by your hip and waist. Not sure of your size? Same chart. Size exchanges are free.
Snug at first is a feature
That tight feeling is the fabric doing its job. It stretches and molds to the shape of your body after a few wears, and then it just feels like yours.
The fit"They fit really snug. But not unbearably so."
Heather W.
Stretches out"I bought more because the ad said they stretch out. My other pairs are 2 years old."
Shawn L.
- 60-day full refund, even if worn
- Free size exchanges
- Free U.S. shipping, 3 to 4 business days
Size Chart and Fit Guide for black compression leggings
One size chart for the whole Mass & Slim collection, based on standard women's U.S. sizing.
← Swipe to see the full chart →
| Size | US Size | Hip | Waist | Height | Weight (approx.) |
|---|---|---|---|---|---|
| Small | 6 / 8 | 36 to 38" | 26 to 28" | 4'11" to 5'6" | 115 to 135 lbs |
| Medium | 10 / 12 | 39 to 41" | 29 to 31" | 5'2" to 5'8" | 135 to 160 lbs |
| Large | 14 / 16 | 42 to 44" | 32 to 34" | 5'4" to 6'0" | 160 to 185 lbs |
| Extra Large | 18 / 20 | 45 to 47" | 35 to 37" | 5'5" to 6'2" | 185 to 215 lbs |
Black Compression Leggings (you're here): As the name says, these are true compression leggings worn as outerwear, so they fit firmer and feel snug. Size up one full size from your usual U.S. size. Tip: if you wear a Medium in our grey Mass & Slim shapewear, order a Large in the black compression leggings. The compression fabric fits more snugly, while the grey shapewear has more stretch so it sits comfortably under your clothes.
Grey Shapewear (Shorts, Leggings, Waist Shaper): Order your true U.S. size. Size up only if you're between two sizes. For example, if you're between a Medium and a Large, go with the Large.
Wrong size? Exchanges are free. If your first pair isn't quite right, we'll help you find the perfect size.
Wrong size"I ordered the wrong size and they were quick to send me my correct size! Excellent customer service!"
Summer, verified buyer
How to put them on
They're easy to put on with the right technique. Here's the easiest way.
- Start with gentle hands. Keep sharp nails away from the fabric.
- Roll the top inside out. Fold the waistband down so the top part of the leggings is turned inside out.
- Put in each leg. Step in one leg at a time and ease them up over your calves and knees.
- Roll it up over your hips and thighs. Once you get to your thighs, roll the top back over and up into place at your waist, smoothing as you go.
- Give them a few wears. The fabric stretches and molds to the shape of your body, so they feel more like yours every time.
Fully opaque, squat-proof, and made to be worn on their own
These black anti-cellulite compression leggings are made to be worn on their own as outerwear. The premium black fabric is:
- Completely opaque
- Squat-proof
- No see-through
- Gym-ready
You can wear them out the door and not think about it. They look like high-end fashion leggings while quietly doing the work of anti-cellulite compression.
Tap below to watch Tanya in an XL and another customer in a Medium.
See Mass & Slim Compression Leggings in Action
Tanya is wearing size XL
Customer wearing size Medium
A waistband that stays put, and comfort for a long day
The waistband
The high waistband smooths your midsection and stays put all day. No rolling, no sliding, no constant tugging. Just a sleek, sculpted shape that stays comfortable through workouts, errands, and everything in between.
The waistband"These leggings are very comfortable, the waist band does not roll down, the compression is just right."
Cheryl I.
Cool, breathable, and made for long days on your feet
Made with a breathable, lightweight smart textile, the fabric has a cool feel against your skin, so even during a workout or a long day on your feet, these leggings help keep you comfortable instead of hot. Soft, flexible, and moisture-wicking, with strong compression support that lasts. Many women wear theirs 8 to 12 hours a day.
End of the day"After wearing them for a full day, I felt a major difference. My legs didn't feel half as heavy as usual by the end of the day."
Heather W.
How to wear them: gym, errands, or out for the day
Wear your black anti-cellulite compression leggings on their own. Put them on and go.
- At the gym. Squat-proof and gym-ready.
- Running errands. The high waistband stays put, with no constant tugging.
- Out for the day. They look like high-end fashion leggings.
- Travel days. Breathable cooling comfort for errands, travel and workouts.
For the best results
- Wear the leggings about 8 hours a day, for at least 30 days.
- As you move, the Tourmaline® beads create a gentle micro-massage.
- Over time, that steady massage helps support circulation and smoother-looking skin.
Supportive Compression. Sculpted Confidence. Smoother-Looking Legs in 30 Days.
You're wondering if they work. Fair question, so here's the plain answer.
Mass & Slim Compression Leggings combine supportive, sculpting compression with Tourmaline® micro-massage technology to shape your figure, support circulation, and smooth the look of cellulite over time. They're high-waisted, fully opaque, and squat-proof, made to be worn on their own at the gym, running errands, or anywhere you want smoother, more sculpted legs.
Most compression leggings just squeeze. Mass & Slim works with you as you move, giving you instant shaping now and gradual results with regular wear.
- Helps smooth the appearance of cellulite
- Lifts and shapes the buttocks for a rounder, more sculpted look
- Supports healthy blood and lymph flow
- Firm, high-waisted compression that shapes you from waist to ankle
- Breathable, cooling fabric that keeps you comfortable, not hot
- Fully opaque and squat-proof outerwear
- Made for 8 to 12 hours of daily wear
Held in"These are absolutely heavenly! They hold you in and seems to be diminishing the cellulite a bit. Love them!"
Janis K.
Sculpting compression that lifts and shapes
These give you firmer compression than our grey shapewear line, with a supportive, tummy-control hold that lifts your buttocks and shapes your waist, hips, thighs, and calves. The result is a smooth, confident silhouette that looks as good as it feels. You feel held in, and you can leave the house in leggings on their own.
Anti-cellulite support technology
As you walk, move, or work out, the embedded Tourmaline® beads help support:
- Healthy blood circulation
- Lymphatic flow
- Less fluid retention
- Smoother-looking skin over time
Clinically tested. Independently verified.
In a 30-day third-party clinical study, participants who wore Mass & Slim 8 hours a day experienced:
*Results based on Third-party clinical study: 30 women wore the shorts 8 hours a day for 30 days with a balanced diet. No control group. Individual results may vary.
What Mass & Slim means, and how the Tourmaline® micro-massage works
Mass & Slim stands for Massage and Slimming. The secret is in the fabric, a smart compression textile with hundreds of Tourmaline® beads woven right in, working against your skin to help refine your shape over time. It works in two ways:
- Right away: A firm, corset-like hold instantly sculpts and smooths your belly, buttocks, and thighs for a more defined shape that stays comfortably in place.
- Over time: With regular wear, the gentle micro-massage from the Tourmaline® beads helps improve your blood and lymph flow, which helps smooth the look of cellulite and reduce inches.
Hundreds of small Tourmaline® beads are embedded right into the fabric. As you move through your day, the rounded beads create a gentle, steady micro-massage against your skin. With regular wear, that massaging effect helps improve your blood and lymph flow over time, which helps smooth the look of cellulite and reduce inches.
Your 30-day Mass & Slim plan
Here's the month, week by week.
Weeks 1 to 2: Instant shaping and firm support. Your legs often feel more supported while you're up and moving.
Weeks 2 to 3: Your skin may start to feel smoother. Some women notice less puffiness or swelling.
Weeks 3 to 4: Many women report a smoother look to cellulite and a few inches lost.
Consistency is everything. The women who see the best results wear them regularly.
Made for women with busy lives
If you're on your feet all day, you're who we made these for. Mass & Slim Compression Leggings have become a quiet favorite for:
- Nurses and healthcare workers on long shifts
- Women who are on their feet all day
- Busy moms juggling everything at once
- Women over 45 who care about circulation and shape
- Women who want anti-cellulite leggings that fit right into their routine
- Women dealing with leg fatigue, swelling, varicose veins, lymphedema concerns, or post-workout recovery
Try them for 60 days
Slip them on. Wear them to the gym, around town, or out for the day. You'll feel the firm support and sculpted shape right away, and see the difference over 30 days as the fabric molds to your body like a second skin.
Not sure about the fit or the feel? You have a 60-day full refund, even if worn. Free size exchanges too, and free U.S. shipping in 3 to 4 business days.
60-Day Money-Back Guarantee · Free Size Exchanges · Rated 4.47/5 by Real Customers
Wearing them under clothes? Try the grey shapewear
Every Mass & Slim piece is built on the same smart compression textile with embedded Tourmaline® beads to help support circulation, lymph flow, and smoother-looking skin. The difference is how you wear them and how firm the compression feels.
Mass & Slim Shapewear (Grey). Worn UNDER Your Clothes.
Soft, stretchy, breathable shapewear made to disappear under your everyday outfits. More stretch, more flexibility, and built for 8 to 12 hours of wear at work, at home, or out and about. The grey collection smooths your stomach, lifts your buttocks, and softens the look of cellulite. Order your true size.
- Shapewear Leggings. Full-length shaping from waist to ankle. Best under pants, jeans, and longer outfits.
- Shapewear Shorts. Shapes your waist, hips, and upper thighs. Best under dresses, skirts, and shorter hemlines.
- Waist Shaper. Targeted waist and midsection support. Pairs with anything.
A lot of women own both. The black compression leggings for days they want stronger sculpting out in the open, and the grey shapewear for invisible smoothing under everyday clothes.
Fabric, care & safety
Composition: 61.3% Polyamide, 28.5% Polyester, 10.2% Spandex.
Care: Machine wash on a gentle cycle in cold water. Hang dry, or use a low temperature setting if you use a dryer.
Please wear them safely:
- Never wear them over open wounds, or on skin that's swollen, inflamed, or irritated.
- Don't wear them if you've had surgery recently or if you're pregnant.
- If you have any health concerns, check with your healthcare provider before use.
Your questions, answered
What size should I order?
Order one full size up from your usual U.S. size. Compression leggings are made to fit snug, and if you're not used to compression, that can feel tight at first. Sizing up gives you a more comfortable fit. If you wear a Medium in our grey shapewear, order a Large in these. See the size chart.
What's the easiest way to put them on?
It's all in the technique. Roll the top inside out, put in each leg, and once you get to your thighs, roll it back over your hips and up to your waist. Use gentle hands and keep sharp nails away from the fabric. After a few wears, the fabric molds to your shape. See how to put them on.
Why do the leggings feel snug at first?
That's on purpose. The firm compression fabric is meant to feel tight when it's new. After three or four wears, it relaxes and molds to your body for a personalized fit that feels like a second skin.
Are they really squat-proof and fully opaque?
Yes. The premium black fabric is fully opaque and squat-proof, with no see-through. They look like high-end fashion leggings while giving you all the benefits of anti-cellulite compression. Wear them to the gym, around town, or out for the day with full confidence.
Will the waistband roll down?
No. The high waistband stays put all day. No rolling, no sliding, no constant tugging.
Can I wear them all day?
Yes. The breathable fabric keeps you comfortable all day long, and plenty of customers wear them 8 to 12 hours daily, including during workouts. For the best results, wear them 8 hours a day for at least 30 days.
Will they make me feel hot?
Just the opposite. Mass & Slim Compression Leggings are made with a breathable fabric that has a cool feel, so you stay comfortable during workouts, long shifts, and warm days.
Do they really work?
Here's the honest answer. You get instant shaping now and gradual results with regular wear, so give them time. Wear them 8 hours a day for at least 30 days. Visible results in 30 days*.
*Results based on Third-party clinical study: 30 women wore the shorts 8 hours a day for 30 days with a balanced diet. No control group. Individual results may vary.
What if they don't fit?
Then we make it easy. You have a 60-day full refund, even if worn, and free size exchanges. If your first pair isn't quite right, we'll help you find the perfect size.
How long are they? Will they fit my height?
Choose by the size chart. The fabric is stretchy, so it adapts to your height and shape.
What's the difference between the grey shapewear and the black compression leggings?
Both use the same smart compression textile with embedded Tourmaline® beads. The difference is how firm they feel and how you wear them:
- Black Compression Leggings. Firmer compression, fully opaque, made to be worn on their own as outerwear. We recommend sizing up one full size.
- Grey Shapewear. Softer and stretchier, made to be worn under your clothes for all-day comfort. Order your true size. Take a look at the Shapewear Shorts, Shapewear Leggings, and Waist Shaper.
How do the Tourmaline beads work?
Tourmaline® beads are embedded right into the fabric. As you move, they create a gentle micro-massage against your skin. With regular wear, that massaging effect helps improve your blood and lymph flow over time, which helps smooth the appearance of cellulite and reduce inches.
Are these good for lymphedema or lipedema?
Many women with lymphedema or lipedema reach for Mass & Slim Leggings for their firm but breathable compression. The Tourmaline® beads help support lymphatic flow and ease the feeling of swelling, which makes them comfortable for all-day wear. If you have a medical condition, please check with your healthcare provider before use.
Are these good for nurses, moms, and women over 45?
Absolutely. These are some of our most loyal customers. The mix of firm sculpting compression, circulation support, and all-day comfort is exactly what women on their feet all day are looking for.
Ready to feel the difference?
Join the thousands of women across the U.S. who've made Mass & Slim Compression Leggings part of their everyday routine. Sculpting compression, real circulation support, and a confident shape that's made to be seen. Order one size up, give them a few wears, and let them become yours.
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FAQs
Tourmaline® beads create a massage effect that boosts blood and lymphatic circulation. The improved circulation helps to reduce cellulite and inches over time.
The Gray Mass & Slim Shapewear is designed to wear under clothes—true to U.S. sizing. Size up only if you’re between sizes.
The Black Mass & Slim Compression Leggings are outerwear with firmer compression, so we suggest sizing up one full size. Both lift, shape, and help improve circulation to reduce inches and cellulite over time.
Our products are clinically tested to show visible results within 30 days, with reductions of up to -3.2 cm in the hip area and -2.3 cm in the thighs. For best results, we recommend wearing the garment for 8 hours a day for 30 consecutive days, as per clinical studies.
Whether you're a nurse, new mom, or constantly on the go, Mass & Slim shapewear fits seamlessly into your routine, offering a lifting and shaping effect for a flattering silhouette.
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