TheBlackPurple
Mass & Slim High-Waisted Anti-Cellulite Shapewear Shorts
Mass & Slim Shorts
Smooth, lifted and comfortable under your dresses, jeans and scrubs.
High-waisted, seamless shaping shorts with Tourmaline beads embedded into the fabric. They smooth your waistline, lift the buttocks and shape your hips and thighs the moment you put them on, while the beads give a gentle micro-massage that supports circulation and lymphatic flow. Made for nurses, moms and every woman 40+ on her feet all day, without the discomfort of traditional shapewear.
One-time purchase. No subscription.
Clinically Tested. Independently Verified.
In a 30-day third-party clinical study, women who wore Mass & Slim Shorts 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 women are saying
On a 10 hour shift"I'm a nurse, these are amazing under my scrubs. It's like a booty massage for my 10 hour shifts."
Cyndee L., verified buyer
No rolling"Most everything I've tried out on the market has always rolled. These stay put!"
Caroline S., verified buyer
Holds in, not tight"They hold everything in without feeling tight."
Nancy B., verified buyer
Under a dress"I wore them under a dress for a party. They gave great support while being super comfortable."
Pietra A., verified buyer
All-day wear"Shorts are comfortable for all day wear under any garment of clothing. Loving these!"
Kate S., verified buyer
Read all verified customer reviews
Wearing them every day? See how the 3-Pack saves you $64
The things you worry about, answered
What they do for you
- Smooths your waistline, lifts the buttocks and shapes your hips and thighs the moment you put them on
- Helps smooth the appearance of cellulite with consistent wear*
- Supports healthy circulation and lymphatic flow
- Breathable, cooling comfort for 8 to 12 hour wear
- Invisible under clothing, with no rolling, pinching, or visible lines
Will they roll down?
No. The high-waisted, seamless design stays put and doesn't roll down or pinch, even after hours on your feet.
Will they show under my clothes?
No. They sit smooth and flat under dresses, skirts, jeans, scrubs and work pants, so no one will know they're there. Under very thin or skin-tight fabric, pair them with a slightly heavier layer for the smoothest look.
Will they be comfortable on a long shift?
Unlike traditional shapewear that squeezes, Mass & Slim Shorts move with your body. The breathable, cooling fabric sits smoothly against the skin, made for 8 to 12 hour wear.
Will my tired, heavy legs feel lighter?
For women on their feet all day, the gentle support and Tourmaline micro-massage help legs feel lighter and more comfortable throughout the day.
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 |
One size chart for the entire Mass & Slim collection, true to women's U.S. sizing. As you wear them, the fabric gradually stretches and molds to the natural shape of your body, becoming more comfortable over time, like a second skin.
Buying the Black Compression Leggings (outerwear)? They have firmer compression, so size up one full size from your usual U.S. size. They feel snug at first, then stretch and mold to your body shape after a few wears.
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 for 60 days
Slip them on. Wear them under your scrubs, your favorite jeans, your work dress. 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 · ✓ Trusted by Nurses and Moms Across the U.S.
Plan your rotation
One pair to try. Three pairs so you never skip a day.
The clinical study had women wear the shorts 8 hours a day for 30 days.* Consistency is the key, and the women who see the best results wear them daily. They are machine washable and dryer safe, so a simple rotation keeps one pair always ready. One pair is a fine place to start. If you want to wear them every day, here is the math.
Thinking of two pairs? Two singles cost $175.90. The 3-Pack is $199.85, which is $23.95 more for a third pair.
Sizing first: order your true U.S. size, not smaller (between sizes? size up). Check the size chart. If any pair is not the right size, exchanges are free: we send a prepaid label and ship the new size at no cost.
1 pair
$87.95
$87.95 per pair
The shorts on this page. Try one pair first, see how the fit feels, and add more later if you love them.
Choose my size, 1 pairShorts 3-Pack
$199.85
$66.62 per pair
- Three pairs: one to wear, one in the wash, one ready
- Saves $64 vs three singles ($263.85)
- Any pair not the right size? Exchanges are free.
Want a full set instead of three pairs of shorts? The Complete Shapewear Bundle (shorts, leggings and waist shaper) is $199.85 and saves $64 vs buying the three separately.
Savings are measured against buying the same items one at a time at today's prices. Not sure of your size? Check the size chart first. It is one chart for every Mass & Slim product, and exchanges are free.
How the Tourmaline micro-massage works
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, keeping blood flowing through tired legs
- Lymphatic flow, for lighter-feeling legs
- Smoother-looking skin, softening the visible appearance of cellulite over time
- Lighter-feeling legs, especially valuable for women who stand all day
How to wear them
- Wear the shorts 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 legs 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, and thighs.*
Consistency is the key. The women who see the best results wear them daily.
Frequently asked questions
Is this a subscription?
No. It is a one-time purchase. There is nothing to cancel.
One pair or the 3-Pack?
One pair works well to start. If you plan to wear them daily, the Shorts 3-Pack gives you one pair to wear, one in the wash, and one ready for tomorrow, at $66.62 per pair. It saves you $64 versus buying three separately.
What if they don't fit?
We offer free size exchanges: email info@theblackpurple.com with your order number and the size you'd like, and we'll send a prepaid label and ship your new size at no cost. And if you're not happy for any reason, our 60-Day Money-Back Guarantee covers you, even if you've worn them.
How fast does it ship?
U.S. standard delivery is free and takes 3 to 4 business days.
Can I wear them all day?
Yes. The breathable, cooling fabric is designed for extended wear. Many customers, including nurses on 12 hour shifts, wear them 8 to 12 hours a day.
Will they make me feel hot?
The fabric is breathable and cooling, designed for all-day wear under scrubs, work clothes and dresses.
How do the Tourmaline beads work?
Tourmaline beads are embedded in the fabric. As you move, they create a gentle micro-massage that supports circulation, lymphatic flow, and the appearance of smoother skin over time.
How soon will I see results?
The shaping is immediate. In the clinical study, women wore them 8 hours a day for 30 days: 73% saw a visible improvement in the appearance of cellulite.* Individual results may vary.
Grey shapewear or black compression leggings?
- Grey Shapewear. More elastic, worn under clothing for all-day comfort. Smooths the stomach, lifts the buttocks, and softens the appearance of cellulite.
- Black Compression Leggings. Firmer compression, fully opaque and squat-proof, worn on their own as outerwear. Snug at first, then they mold to your shape after a few wears.
Are these good for nurses, moms, and women 40+?
Yes. These are some of our most loyal customers: nurses on long shifts, busy moms, teachers, retail workers and anyone on their feet all day, who want comfortable shaping and lighter-feeling legs.
The Mass & Slim family. Choose what works for your life.
Every Mass & Slim product is powered by 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. Worn UNDER your clothes.
- Shapewear Shorts (you're here). Waist, hips and upper thighs. Best under dresses and skirts.
- Shorts 3-Pack. Wear them daily and save $64.
- Shapewear Leggings. Waist to ankle. Best under pants and jeans.
- Waist Shaper. Targeted waist and midsection support.
- Complete Shapewear Bundle. Shorts, leggings and waist shaper in one set.
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. 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 part of their everyday routine. Comfortable shaping, real circulation support, and a sculpted silhouette you can wear all day.
Start with one pair, or save with a daily rotation.
Shop the Shorts 3-Pack and save $64 Prefer one pair? Choose my size60-Day Money-Back Guarantee · Free Size Exchanges · Secure Checkout
Mass & Slim High-Waisted Anti-Cellulite Shapewear Shorts
Top Quality Store on Google
Estimated delivery between November 08 and November 10.
Mass & Slim Shorts
Smooth, lifted and comfortable under your dresses, jeans and scrubs.
High-waisted, seamless shaping shorts with Tourmaline beads embedded into the fabric. They smooth your waistline, lift the buttocks and shape your hips and thighs the moment you put them on, while the beads give a gentle micro-massage that supports circulation and lymphatic flow. Made for nurses, moms and every woman 40+ on her feet all day, without the discomfort of traditional shapewear.
One-time purchase. No subscription.
Clinically Tested. Independently Verified.
In a 30-day third-party clinical study, women who wore Mass & Slim Shorts 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 women are saying
On a 10 hour shift"I'm a nurse, these are amazing under my scrubs. It's like a booty massage for my 10 hour shifts."
Cyndee L., verified buyer
No rolling"Most everything I've tried out on the market has always rolled. These stay put!"
Caroline S., verified buyer
Holds in, not tight"They hold everything in without feeling tight."
Nancy B., verified buyer
Under a dress"I wore them under a dress for a party. They gave great support while being super comfortable."
Pietra A., verified buyer
All-day wear"Shorts are comfortable for all day wear under any garment of clothing. Loving these!"
Kate S., verified buyer
Read all verified customer reviews
Wearing them every day? See how the 3-Pack saves you $64
The things you worry about, answered
What they do for you
- Smooths your waistline, lifts the buttocks and shapes your hips and thighs the moment you put them on
- Helps smooth the appearance of cellulite with consistent wear*
- Supports healthy circulation and lymphatic flow
- Breathable, cooling comfort for 8 to 12 hour wear
- Invisible under clothing, with no rolling, pinching, or visible lines
Will they roll down?
No. The high-waisted, seamless design stays put and doesn't roll down or pinch, even after hours on your feet.
Will they show under my clothes?
No. They sit smooth and flat under dresses, skirts, jeans, scrubs and work pants, so no one will know they're there. Under very thin or skin-tight fabric, pair them with a slightly heavier layer for the smoothest look.
Will they be comfortable on a long shift?
Unlike traditional shapewear that squeezes, Mass & Slim Shorts move with your body. The breathable, cooling fabric sits smoothly against the skin, made for 8 to 12 hour wear.
Will my tired, heavy legs feel lighter?
For women on their feet all day, the gentle support and Tourmaline micro-massage help legs feel lighter and more comfortable throughout the day.
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 |
One size chart for the entire Mass & Slim collection, true to women's U.S. sizing. As you wear them, the fabric gradually stretches and molds to the natural shape of your body, becoming more comfortable over time, like a second skin.
Buying the Black Compression Leggings (outerwear)? They have firmer compression, so size up one full size from your usual U.S. size. They feel snug at first, then stretch and mold to your body shape after a few wears.
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 for 60 days
Slip them on. Wear them under your scrubs, your favorite jeans, your work dress. 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 · ✓ Trusted by Nurses and Moms Across the U.S.
Plan your rotation
One pair to try. Three pairs so you never skip a day.
The clinical study had women wear the shorts 8 hours a day for 30 days.* Consistency is the key, and the women who see the best results wear them daily. They are machine washable and dryer safe, so a simple rotation keeps one pair always ready. One pair is a fine place to start. If you want to wear them every day, here is the math.
Thinking of two pairs? Two singles cost $175.90. The 3-Pack is $199.85, which is $23.95 more for a third pair.
Sizing first: order your true U.S. size, not smaller (between sizes? size up). Check the size chart. If any pair is not the right size, exchanges are free: we send a prepaid label and ship the new size at no cost.
1 pair
$87.95
$87.95 per pair
The shorts on this page. Try one pair first, see how the fit feels, and add more later if you love them.
Choose my size, 1 pairShorts 3-Pack
$199.85
$66.62 per pair
- Three pairs: one to wear, one in the wash, one ready
- Saves $64 vs three singles ($263.85)
- Any pair not the right size? Exchanges are free.
Want a full set instead of three pairs of shorts? The Complete Shapewear Bundle (shorts, leggings and waist shaper) is $199.85 and saves $64 vs buying the three separately.
Savings are measured against buying the same items one at a time at today's prices. Not sure of your size? Check the size chart first. It is one chart for every Mass & Slim product, and exchanges are free.
How the Tourmaline micro-massage works
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, keeping blood flowing through tired legs
- Lymphatic flow, for lighter-feeling legs
- Smoother-looking skin, softening the visible appearance of cellulite over time
- Lighter-feeling legs, especially valuable for women who stand all day
How to wear them
- Wear the shorts 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 legs 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, and thighs.*
Consistency is the key. The women who see the best results wear them daily.
Frequently asked questions
Is this a subscription?
No. It is a one-time purchase. There is nothing to cancel.
One pair or the 3-Pack?
One pair works well to start. If you plan to wear them daily, the Shorts 3-Pack gives you one pair to wear, one in the wash, and one ready for tomorrow, at $66.62 per pair. It saves you $64 versus buying three separately.
What if they don't fit?
We offer free size exchanges: email info@theblackpurple.com with your order number and the size you'd like, and we'll send a prepaid label and ship your new size at no cost. And if you're not happy for any reason, our 60-Day Money-Back Guarantee covers you, even if you've worn them.
How fast does it ship?
U.S. standard delivery is free and takes 3 to 4 business days.
Can I wear them all day?
Yes. The breathable, cooling fabric is designed for extended wear. Many customers, including nurses on 12 hour shifts, wear them 8 to 12 hours a day.
Will they make me feel hot?
The fabric is breathable and cooling, designed for all-day wear under scrubs, work clothes and dresses.
How do the Tourmaline beads work?
Tourmaline beads are embedded in the fabric. As you move, they create a gentle micro-massage that supports circulation, lymphatic flow, and the appearance of smoother skin over time.
How soon will I see results?
The shaping is immediate. In the clinical study, women wore them 8 hours a day for 30 days: 73% saw a visible improvement in the appearance of cellulite.* Individual results may vary.
Grey shapewear or black compression leggings?
- Grey Shapewear. More elastic, worn under clothing for all-day comfort. Smooths the stomach, lifts the buttocks, and softens the appearance of cellulite.
- Black Compression Leggings. Firmer compression, fully opaque and squat-proof, worn on their own as outerwear. Snug at first, then they mold to your shape after a few wears.
Are these good for nurses, moms, and women 40+?
Yes. These are some of our most loyal customers: nurses on long shifts, busy moms, teachers, retail workers and anyone on their feet all day, who want comfortable shaping and lighter-feeling legs.
The Mass & Slim family. Choose what works for your life.
Every Mass & Slim product is powered by 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. Worn UNDER your clothes.
- Shapewear Shorts (you're here). Waist, hips and upper thighs. Best under dresses and skirts.
- Shorts 3-Pack. Wear them daily and save $64.
- Shapewear Leggings. Waist to ankle. Best under pants and jeans.
- Waist Shaper. Targeted waist and midsection support.
- Complete Shapewear Bundle. Shorts, leggings and waist shaper in one set.
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. 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 part of their everyday routine. Comfortable shaping, real circulation support, and a sculpted silhouette you can wear all day.
Start with one pair, or save with a daily rotation.
Shop the Shorts 3-Pack and save $64 Prefer one pair? Choose my size60-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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