TheBlackPurple
Mass & Slim Compression Leggings
Supportive Compression. Sculpted Confidence. Smoother-Looking Legs in 30 Days.
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.
- 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
- Fully opaque and squat-proof outerwear
- Breathable, cooling fabric that keeps you comfortable, not hot
- Made for 8 to 12 hours of daily wear
Most compression leggings just squeeze. Mass & Slim works with you as you move, giving you instant shaping now and gradual results with regular wear.
See Mass & Slim Compression Leggings in Action
Tanya is wearing size XL
Customer wearing size Medium
What Does Mass & Slim Mean?
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.
Why Women Love Mass & Slim Compression Leggings
Sculpting Compression That Lifts and Shapes
These leggings 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.
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
Fully Opaque Outerwear Leggings
Made to be worn on their own as outerwear. The premium black fabric is:
- Completely opaque
- Squat-proof
- No see-through
- Gym-ready
They look like high-end fashion leggings while quietly doing the work of anti-cellulite compression.
High-Waisted Sculpting Support
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.
Breathable, Cooling Comfort for All-Day Wear
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.
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 a third-party clinical study. Individual results may vary.
How Tourmaline® Micro-Massage Technology Works
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.
How to Wear Them
- 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.
Your 30-Day Mass & Slim Plan
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
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
The Mass & Slim Family. Pick What Fits Your Life.
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 Compression Leggings (Black). Worn ON THEIR OWN.
You're here. High-waisted outerwear leggings with firmer compression than the grey shapewear. They feel a little snug at first, then stretch and mold to your body after a few wears, becoming incredibly comfortable and made just for your shape. Wear them with confidence to the gym, running errands, or out for the day.
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.
- Shapewear Shorts. Shapes your waist, hips, and upper thighs. Best under dresses, skirts, and shorter hemlines.
- Shapewear Leggings. Full-length shaping from waist to ankle. Best under pants, jeans, and longer outfits.
- 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.
Try Mass & Slim for 60 Days, Risk-Free
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.
If you don't love how they feel, how they fit, or the results you see, return or exchange them within 60 days, no questions asked. Free size exchanges. Free returns.
✓ 60-Day Money-Back Guarantee · ✓ Free Size Exchanges · ✓ Rated 4.47/5 by Real Customers
Frequently Asked Questions
Size Chart and Fit Guide
One size chart for the whole Mass & Slim collection, based on standard women's U.S. sizing.
← Swipe to see 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.
Easy to put on: turn the leggings inside out, bunch up the legs, and roll them smoothly up over your hips and thighs.
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.
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.
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.
Can I wear them all day?
Yes. The breathable fabric keeps you comfortable all day long. For the best results, wear them 8 hours a day for at least 30 days. Plenty of customers wear them 8 to 12 hours daily, including during workouts.
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.
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 there any safety precautions?
Please wear Mass & Slim 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.
What if they don't fit?
We offer 60-day risk-free returns and free size exchanges. If your first pair isn't quite right, we'll help you find the perfect size.
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.
60-Day Money-Back Guarantee · Free Size Exchanges · Secure Checkout
Mass & Slim Compression Leggings
Top Quality Store on Google
Estimated delivery between June 28 and June 30.
Supportive Compression. Sculpted Confidence. Smoother-Looking Legs in 30 Days.
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.
- 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
- Fully opaque and squat-proof outerwear
- Breathable, cooling fabric that keeps you comfortable, not hot
- Made for 8 to 12 hours of daily wear
Most compression leggings just squeeze. Mass & Slim works with you as you move, giving you instant shaping now and gradual results with regular wear.
See Mass & Slim Compression Leggings in Action
Tanya is wearing size XL
Customer wearing size Medium
What Does Mass & Slim Mean?
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.
Why Women Love Mass & Slim Compression Leggings
Sculpting Compression That Lifts and Shapes
These leggings 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.
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
Fully Opaque Outerwear Leggings
Made to be worn on their own as outerwear. The premium black fabric is:
- Completely opaque
- Squat-proof
- No see-through
- Gym-ready
They look like high-end fashion leggings while quietly doing the work of anti-cellulite compression.
High-Waisted Sculpting Support
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.
Breathable, Cooling Comfort for All-Day Wear
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.
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 a third-party clinical study. Individual results may vary.
How Tourmaline® Micro-Massage Technology Works
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.
How to Wear Them
- 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.
Your 30-Day Mass & Slim Plan
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
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
The Mass & Slim Family. Pick What Fits Your Life.
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 Compression Leggings (Black). Worn ON THEIR OWN.
You're here. High-waisted outerwear leggings with firmer compression than the grey shapewear. They feel a little snug at first, then stretch and mold to your body after a few wears, becoming incredibly comfortable and made just for your shape. Wear them with confidence to the gym, running errands, or out for the day.
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.
- Shapewear Shorts. Shapes your waist, hips, and upper thighs. Best under dresses, skirts, and shorter hemlines.
- Shapewear Leggings. Full-length shaping from waist to ankle. Best under pants, jeans, and longer outfits.
- 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.
Try Mass & Slim for 60 Days, Risk-Free
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.
If you don't love how they feel, how they fit, or the results you see, return or exchange them within 60 days, no questions asked. Free size exchanges. Free returns.
✓ 60-Day Money-Back Guarantee · ✓ Free Size Exchanges · ✓ Rated 4.47/5 by Real Customers
Frequently Asked Questions
Size Chart and Fit Guide
One size chart for the whole Mass & Slim collection, based on standard women's U.S. sizing.
← Swipe to see 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.
Easy to put on: turn the leggings inside out, bunch up the legs, and roll them smoothly up over your hips and thighs.
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.
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.
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.
Can I wear them all day?
Yes. The breathable fabric keeps you comfortable all day long. For the best results, wear them 8 hours a day for at least 30 days. Plenty of customers wear them 8 to 12 hours daily, including during workouts.
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.
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 there any safety precautions?
Please wear Mass & Slim 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.
What if they don't fit?
We offer 60-day risk-free returns and free size exchanges. If your first pair isn't quite right, we'll help you find the perfect size.
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.
60-Day Money-Back Guarantee · Free Size Exchanges · Secure Checkout
Free 60 Day Return Policy!
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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