TheBlackPurple
Mass & Slim High-Waisted Anti-Cellulite Shapewear Leggings
Mass & Slim Shapewear Leggings
High-waisted, full-length anti-cellulite shapewear leggings
Tourmaline beads embedded in the fabric give a gentle micro-massage, while the high waist smooths your waistline, lifts the buttocks and shapes your hips, thighs, calves and ankles the moment you put them on.
Made for nurses, moms, professionals and women over 45 who are on their feet all day. Most shapewear squeezes and compresses. Mass & Slim works with your body, with instant shaping and visible improvements with consistent wear.
- 60-day full refund, even if worn
- Free size exchanges
- Free U.S. shipping, 3 to 4 days
- Afterpay: 4 easy payments
One-time purchase. No subscription.
Clinically Tested. Independently Verified.
In a 30-day third-party clinical study, women who wore Mass & Slim 8 hours a day saw:
*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.
Watch them in action
What Mass & Slim shapewear wearers say
Critical care nurse"I am a critical care nurse and these leggings are saving my legs. I am no longer feeling leg fatigue at the end of my shift… In addition my legs look smoother. My husband noticed the back of my thighs appeared less dimpled and he was a skeptic. I am ordering a second pair."
Leann K., verified buyer
On her feet 10+ hours"I work in manufacturing and on feet 10+ hours a day… I have had no 'roll' issues like many brands of [shapewear] I have tried, these stay in place."
Elaine K., verified buyer
Was skeptical"I was skeptical but after wearing them so far for three weeks I am visibly noticing a difference in my cellulite on my upper legs… They don't make me feel hot."
Keli A., verified buyer
Size check"These leggings are sooo comfortable, you won't want to take them off! I am a size 14 and a size L worked perfectly."
Bonnie C., verified buyer
Fourth pair"This is the fourth pair I have gotten over the years… it's almost like wearing compression socks on my whole legs."
Nancy J., verified buyer
Why women choose full-length shapewear leggings
- Smooths the appearance of cellulite from waist to ankle, and helps smooth it further with consistent wear
- Shapes hips, thighs and calves, and lifts the buttocks
- Supports healthy circulation and lymphatic flow
- Breathable, cooling comfort for 8 to 12 hour wear
- Invisible under jeans, scrubs, dresses and work pants
Why full-length instead of shorts?
Leggings shape from your waistline to your ankles, calves included. The gentle full-length support and Tourmaline micro-massage help tired, heavy legs feel lighter and more comfortable. Best under pants, jeans, scrubs and longer outfits.
Will they roll down or dig in?
No. The high-waisted, seamless design stays put, even after long hours on your feet. Unlike traditional shapewear that pinches and rolls, they move with your body. The seamless design sits smoothly under clothing without adding bulk.
Shapewear leggings size chart: find your size
Order your true U.S. size, not smaller. Size up only if you're between two sizes. For example, between Medium and Large, choose Large.
| Size | Hip | Waist | Height and weight (approx.) |
|---|---|---|---|
| SmallUS 6 / 8 | 36 to 38" | 26 to 28" | 4'11" to 5'6" 115 to 135 lbs |
| MediumUS 10 / 12 | 39 to 41" | 29 to 31" | 5'2" to 5'8" 135 to 160 lbs |
| LargeUS 14 / 16 | 42 to 44" | 32 to 34" | 5'4" to 6'0" 160 to 185 lbs |
| Extra LargeUS 18 / 20 | 45 to 47" | 35 to 37" | 5'5" to 6'2" 185 to 215 lbs |
Wrong size? Exchanges are free. Email info@theblackpurple.com with your order number and the size you'd like. We send a prepaid label and ship your new size at no cost.
Try Mass & Slim Leggings for 60 days
Wear them under your scrubs, your favorite jeans, your work pants. Feel the difference in the first few hours, and see the difference over 30 days.
Wear them for 30 days (the length of our clinical study*). Not happy? You still have 60 days from delivery for a full refund, even if you've worn them.
60-Day Money-Back Guarantee. Free size exchanges. Free U.S. standard shipping. Trusted by Nurses and Moms Across the U.S.
One pair or three
Anti-cellulite leggings 3-Pack: one to wear, one in the wash, one ready
The 30-day routine works best with a fresh pair each day, and the women who see the best results wear them daily. They are machine washable and dryer safe.
Two singles cost $195.90. The 3-Pack is $229.85, just $33.95 more for a third pair.
1 pair
$97.95 $109.95
$97.95 per pair
- Pick your size in the buy box at the top
- Or 4 interest-free Afterpay payments of $24.49
- Free exchanges if the size is not right
Choose your size at the top of this page.
Leggings 3-Pack
$229.85 $293.85
$76.62 per pair
- Three pairs, one size for all (between sizes? size up)
- Saves $64 vs three singles ($293.85)
- Or 4 interest-free Afterpay payments of $57.46
- Free exchanges if the size is not right
Want a full set? The Complete Shapewear Bundle (shorts, leggings and waist shaper) is $199.85 and saves $64 vs buying the three separately.
How Tourmaline micro-massage works in these leggings
Hundreds of small Tourmaline beads are embedded directly into the fabric. As you move throughout your day, the beads create a gentle, continuous micro-massage against the skin. That subtle stimulation helps support:
- Healthy circulation and lymphatic flow, keeping blood flowing through tired legs
- Lighter-feeling legs, especially around calves and ankles, and valuable for women who stand all day
- Smoother-looking skin, softening the visible appearance of cellulite over time
How to wear them
- Wear the leggings for 8 hours a day.
- As you move, the Tourmaline beads create a gentle micro-massage.
- Over 30 days, that consistent stimulation supports circulation and smoother-looking skin.
Your 30 day Mass & Slim plan
Week 1 to 2: Immediate shaping and smoothing. Many women say their legs already feel lighter, especially those on their feet all day.
Week 2 to 3: Skin may start to feel smoother. Some women notice their calves and ankles feel lighter after long days on their feet.
Week 3 to 4: Many report a visible improvement in the appearance of cellulite, with subtle changes around the waist, hips, thighs and calves.
Consistency is the key. The women who see the best results wear them daily.
Frequently asked questions about Mass & Slim Leggings
What size should I order? What if they don't fit?
Order your true U.S. size, not smaller. Between two sizes? Size up. See the size chart. If the fit is off, exchanges are free: email info@theblackpurple.com and we ship your new size at no cost.
Is shipping free? Can I pay in installments?
U.S. standard shipping is free and takes 3 to 4 business days. Afterpay is available on every product: pay in 4 easy interest-free payments. One pair is 4 payments of $24.49, the 3-Pack is 4 payments of $57.46.
How tight is the compression?
Gentle, not firm. Unlike traditional shapewear that squeezes, these grey shapewear leggings are soft, stretchy and more elastic, and are built to work with your body. The firmer compression on our site belongs to the separate Black Compression Leggings, which are worn on their own.
Is there a break-in period?
They mold to the shape of your body after 1 or 2 wears, becoming more comfortable over time, like a second skin. You have 60 days from delivery to decide, even if you have worn them.
Can I wear them all day? Will I feel hot?
Yes to all day, and no, they should not make you feel hot. The breathable, cooling fabric is designed to help regulate temperature. Many customers wear them 8 to 12 hours daily under jeans, dresses, scrubs or work attire. "So comfortable, you can even sleep in them."
Do they really work? How soon will I see results?
The shaping is immediate. For visible improvements in the appearance of cellulite, we recommend 8 hours a day for 30 days. Most women notice changes within 4 weeks. In the clinical study, 73% saw a visible improvement in the appearance of cellulite, with up to 3.2 cm reduction around the hips and up to 2.3 cm around the thighs.*
*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.
Are these good for nurses, moms and women over 45?
Yes. Nurses and healthcare professionals, busy moms, teachers, retail workers, stylists and servers are some of our most loyal customers.
The Mass & Slim family. Choose what works for your life.
Every Mass & Slim product uses the same embedded Tourmaline bead technology, supporting circulation, lymphatic flow and the appearance of smoother skin. The difference is how you wear them.
Grey Shapewear. Soft, stretchy, worn UNDER your clothes.
Breathable shapewear for 8 to 12 hour wear at work, at home, or out, with more elasticity and flexibility. The grey collection enhances your silhouette by smoothing the stomach, lifting the buttocks, and softening the appearance of cellulite.
- Shapewear Leggings (you're here). Waist to ankle, with added support for calves and lower legs. Best under pants, jeans and scrubs.
- Leggings 3-Pack. Wear them daily and save $64.
- Shapewear Shorts, $87.95. Waist, hips and upper thighs. Best under dresses and skirts.
- Waist Shaper. Targeted waist and midsection support. Pairs with anything.
Black Compression Leggings. Worn ON THEIR OWN.
Fully opaque, squat-proof outerwear leggings with firmer compression, for the gym, errands or out for the day. They feel a little more snug at first, then stretch and mold to your body after a few wears. This style has its own sizing: size up one full size from your usual U.S. size. Shop Compression Leggings.
Shorts or leggings? Why not both? Many women own both and rotate them. Shorts under dresses and skirts, leggings under pants and scrubs.
Material and care
Composition: 53% Polyamide, 33% Polyester, 14% Elastane.
Care: Machine washable and dryer safe. For longest wear, use a gentle cycle in cold water and dry on low heat.
Ready to feel the difference?
Join thousands of women across the U.S. who've made Mass & Slim Leggings part of their everyday routine. Comfortable full-length shaping, real circulation support, and a sculpted silhouette from waist to ankle.
Shop the Leggings 3-Pack and save $64Prefer one pair? Choose your size at the top of this page.
60-Day Money-Back Guarantee · Free Size Exchanges · Free U.S. Shipping · Secure Checkout
Mass & Slim High-Waisted Anti-Cellulite Shapewear Leggings
Top Quality Store on Google
Estimated delivery between October 29 and October 31.
Mass & Slim Shapewear Leggings
High-waisted, full-length anti-cellulite shapewear leggings
Tourmaline beads embedded in the fabric give a gentle micro-massage, while the high waist smooths your waistline, lifts the buttocks and shapes your hips, thighs, calves and ankles the moment you put them on.
Made for nurses, moms, professionals and women over 45 who are on their feet all day. Most shapewear squeezes and compresses. Mass & Slim works with your body, with instant shaping and visible improvements with consistent wear.
- 60-day full refund, even if worn
- Free size exchanges
- Free U.S. shipping, 3 to 4 days
- Afterpay: 4 easy payments
One-time purchase. No subscription.
Clinically Tested. Independently Verified.
In a 30-day third-party clinical study, women who wore Mass & Slim 8 hours a day saw:
*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.
Watch them in action
What Mass & Slim shapewear wearers say
Critical care nurse"I am a critical care nurse and these leggings are saving my legs. I am no longer feeling leg fatigue at the end of my shift… In addition my legs look smoother. My husband noticed the back of my thighs appeared less dimpled and he was a skeptic. I am ordering a second pair."
Leann K., verified buyer
On her feet 10+ hours"I work in manufacturing and on feet 10+ hours a day… I have had no 'roll' issues like many brands of [shapewear] I have tried, these stay in place."
Elaine K., verified buyer
Was skeptical"I was skeptical but after wearing them so far for three weeks I am visibly noticing a difference in my cellulite on my upper legs… They don't make me feel hot."
Keli A., verified buyer
Size check"These leggings are sooo comfortable, you won't want to take them off! I am a size 14 and a size L worked perfectly."
Bonnie C., verified buyer
Fourth pair"This is the fourth pair I have gotten over the years… it's almost like wearing compression socks on my whole legs."
Nancy J., verified buyer
Why women choose full-length shapewear leggings
- Smooths the appearance of cellulite from waist to ankle, and helps smooth it further with consistent wear
- Shapes hips, thighs and calves, and lifts the buttocks
- Supports healthy circulation and lymphatic flow
- Breathable, cooling comfort for 8 to 12 hour wear
- Invisible under jeans, scrubs, dresses and work pants
Why full-length instead of shorts?
Leggings shape from your waistline to your ankles, calves included. The gentle full-length support and Tourmaline micro-massage help tired, heavy legs feel lighter and more comfortable. Best under pants, jeans, scrubs and longer outfits.
Will they roll down or dig in?
No. The high-waisted, seamless design stays put, even after long hours on your feet. Unlike traditional shapewear that pinches and rolls, they move with your body. The seamless design sits smoothly under clothing without adding bulk.
Shapewear leggings size chart: find your size
Order your true U.S. size, not smaller. Size up only if you're between two sizes. For example, between Medium and Large, choose Large.
| Size | Hip | Waist | Height and weight (approx.) |
|---|---|---|---|
| SmallUS 6 / 8 | 36 to 38" | 26 to 28" | 4'11" to 5'6" 115 to 135 lbs |
| MediumUS 10 / 12 | 39 to 41" | 29 to 31" | 5'2" to 5'8" 135 to 160 lbs |
| LargeUS 14 / 16 | 42 to 44" | 32 to 34" | 5'4" to 6'0" 160 to 185 lbs |
| Extra LargeUS 18 / 20 | 45 to 47" | 35 to 37" | 5'5" to 6'2" 185 to 215 lbs |
Wrong size? Exchanges are free. Email info@theblackpurple.com with your order number and the size you'd like. We send a prepaid label and ship your new size at no cost.
Try Mass & Slim Leggings for 60 days
Wear them under your scrubs, your favorite jeans, your work pants. Feel the difference in the first few hours, and see the difference over 30 days.
Wear them for 30 days (the length of our clinical study*). Not happy? You still have 60 days from delivery for a full refund, even if you've worn them.
60-Day Money-Back Guarantee. Free size exchanges. Free U.S. standard shipping. Trusted by Nurses and Moms Across the U.S.
One pair or three
Anti-cellulite leggings 3-Pack: one to wear, one in the wash, one ready
The 30-day routine works best with a fresh pair each day, and the women who see the best results wear them daily. They are machine washable and dryer safe.
Two singles cost $195.90. The 3-Pack is $229.85, just $33.95 more for a third pair.
1 pair
$97.95 $109.95
$97.95 per pair
- Pick your size in the buy box at the top
- Or 4 interest-free Afterpay payments of $24.49
- Free exchanges if the size is not right
Choose your size at the top of this page.
Leggings 3-Pack
$229.85 $293.85
$76.62 per pair
- Three pairs, one size for all (between sizes? size up)
- Saves $64 vs three singles ($293.85)
- Or 4 interest-free Afterpay payments of $57.46
- Free exchanges if the size is not right
Want a full set? The Complete Shapewear Bundle (shorts, leggings and waist shaper) is $199.85 and saves $64 vs buying the three separately.
How Tourmaline micro-massage works in these leggings
Hundreds of small Tourmaline beads are embedded directly into the fabric. As you move throughout your day, the beads create a gentle, continuous micro-massage against the skin. That subtle stimulation helps support:
- Healthy circulation and lymphatic flow, keeping blood flowing through tired legs
- Lighter-feeling legs, especially around calves and ankles, and valuable for women who stand all day
- Smoother-looking skin, softening the visible appearance of cellulite over time
How to wear them
- Wear the leggings for 8 hours a day.
- As you move, the Tourmaline beads create a gentle micro-massage.
- Over 30 days, that consistent stimulation supports circulation and smoother-looking skin.
Your 30 day Mass & Slim plan
Week 1 to 2: Immediate shaping and smoothing. Many women say their legs already feel lighter, especially those on their feet all day.
Week 2 to 3: Skin may start to feel smoother. Some women notice their calves and ankles feel lighter after long days on their feet.
Week 3 to 4: Many report a visible improvement in the appearance of cellulite, with subtle changes around the waist, hips, thighs and calves.
Consistency is the key. The women who see the best results wear them daily.
Frequently asked questions about Mass & Slim Leggings
What size should I order? What if they don't fit?
Order your true U.S. size, not smaller. Between two sizes? Size up. See the size chart. If the fit is off, exchanges are free: email info@theblackpurple.com and we ship your new size at no cost.
Is shipping free? Can I pay in installments?
U.S. standard shipping is free and takes 3 to 4 business days. Afterpay is available on every product: pay in 4 easy interest-free payments. One pair is 4 payments of $24.49, the 3-Pack is 4 payments of $57.46.
How tight is the compression?
Gentle, not firm. Unlike traditional shapewear that squeezes, these grey shapewear leggings are soft, stretchy and more elastic, and are built to work with your body. The firmer compression on our site belongs to the separate Black Compression Leggings, which are worn on their own.
Is there a break-in period?
They mold to the shape of your body after 1 or 2 wears, becoming more comfortable over time, like a second skin. You have 60 days from delivery to decide, even if you have worn them.
Can I wear them all day? Will I feel hot?
Yes to all day, and no, they should not make you feel hot. The breathable, cooling fabric is designed to help regulate temperature. Many customers wear them 8 to 12 hours daily under jeans, dresses, scrubs or work attire. "So comfortable, you can even sleep in them."
Do they really work? How soon will I see results?
The shaping is immediate. For visible improvements in the appearance of cellulite, we recommend 8 hours a day for 30 days. Most women notice changes within 4 weeks. In the clinical study, 73% saw a visible improvement in the appearance of cellulite, with up to 3.2 cm reduction around the hips and up to 2.3 cm around the thighs.*
*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.
Are these good for nurses, moms and women over 45?
Yes. Nurses and healthcare professionals, busy moms, teachers, retail workers, stylists and servers are some of our most loyal customers.
The Mass & Slim family. Choose what works for your life.
Every Mass & Slim product uses the same embedded Tourmaline bead technology, supporting circulation, lymphatic flow and the appearance of smoother skin. The difference is how you wear them.
Grey Shapewear. Soft, stretchy, worn UNDER your clothes.
Breathable shapewear for 8 to 12 hour wear at work, at home, or out, with more elasticity and flexibility. The grey collection enhances your silhouette by smoothing the stomach, lifting the buttocks, and softening the appearance of cellulite.
- Shapewear Leggings (you're here). Waist to ankle, with added support for calves and lower legs. Best under pants, jeans and scrubs.
- Leggings 3-Pack. Wear them daily and save $64.
- Shapewear Shorts, $87.95. Waist, hips and upper thighs. Best under dresses and skirts.
- Waist Shaper. Targeted waist and midsection support. Pairs with anything.
Black Compression Leggings. Worn ON THEIR OWN.
Fully opaque, squat-proof outerwear leggings with firmer compression, for the gym, errands or out for the day. They feel a little more snug at first, then stretch and mold to your body after a few wears. This style has its own sizing: size up one full size from your usual U.S. size. Shop Compression Leggings.
Shorts or leggings? Why not both? Many women own both and rotate them. Shorts under dresses and skirts, leggings under pants and scrubs.
Material and care
Composition: 53% Polyamide, 33% Polyester, 14% Elastane.
Care: Machine washable and dryer safe. For longest wear, use a gentle cycle in cold water and dry on low heat.
Ready to feel the difference?
Join thousands of women across the U.S. who've made Mass & Slim Leggings part of their everyday routine. Comfortable full-length shaping, real circulation support, and a sculpted silhouette from waist to ankle.
Shop the Leggings 3-Pack and save $64Prefer one pair? Choose your size at the top of this page.
60-Day Money-Back Guarantee · Free Size Exchanges · Free U.S. Shipping · 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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