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Three Pairs. Full-Length Smoothing. A Fresh Pair Every Single Day.
The Mass & Slim Anti-Cellulite Leggings work best when you wear them every day — and that’s exactly what the 3-Pack is built for. One pair on, one in the wash, one ready to go. You never skip a day, and skipping days is the main reason people don’t see results.
- Smooths the appearance of cellulite from waist to ankle
- Tourmaline® micro-massage helps support circulation and lymphatic flow
- High-waisted, seamless fit — invisible under pants, jeans, and scrubs
- Full-length support for thighs, calves, and ankles on long days
- Breathable, cooling comfort for 8 to 12 hour wear
- Enough pairs to wear daily for the full 30-day routine
What’s Included
Not sure on size? Use the sizing guide below — one chart covers the whole Mass & Slim collection.
Why the 3-Pack Instead of One Pair?
1. Daily wear is what gets results — rotation makes daily wear realistic
Mass & Slim Leggings are clinically tested to show visible results when worn 8 hours a day for 30 days. With one pair, laundry day means a missed day. With three, there’s always a clean, dry pair ready — so you actually finish the routine.
2. Better value
Three pairs cost less than buying them one at a time — the saving is shown in the price above.
3. All-day support, especially on your feet (or in a seat)
Full-length shaping with gentle calf-and-ankle support, ideal if you’re standing through a long shift or sitting for hours. A clean pair for work, one for errands or the gym, one in the wash.
What Each Pair Does for You
| Benefit | What it means for you |
|---|---|
| Tourmaline® micro-massage | Hundreds of embedded beads gently massage as you move, helping support circulation and lymphatic flow. |
| Smoother-looking skin | Consistent daily wear helps smooth the appearance of cellulite over time. |
| Full-length high-waisted shaping | Smooths the waistline and shapes hips, thighs, and calves from waist to ankle. |
| Breathable, cooling comfort | Built for 8 to 12 hour wear without rolling, pinching, or overheating. |
| Invisible under clothing | Seamless edges sit smoothly under pants, jeans, scrubs, and longer outfits. |
| Lighter-feeling legs | Gentle lower-leg support that’s especially welcome on long days standing or sitting. |
*Based on a 30-day third-party clinical study with 8 hours of daily wear. Individual results may vary.
Who the 3-Pack Is Best For
- Daily wearers who want a clean pair ready every morning
- Nurses and healthcare workers on long shifts
- People who sit for hours — drivers, desk workers, long commutes
- Busy moms juggling work, kids, and everything between
- Women over 45 who want comfortable shaping that respects their body
- Anyone committing to the full 30-day routine who doesn’t want laundry to interrupt it
How Tourmaline® Micro-Massage Works
Hundreds of tiny Tourmaline® beads are embedded directly into the fabric. As you move, they create a gentle, continuous micro-massage that helps support healthy circulation, lymphatic flow, and the appearance of smoother skin over time.
Want the full technology and clinical breakdown? See the single Mass & Slim Anti-Cellulite Leggings page.
See Mass & Slim in Action
A quick look at how the shapewear shapes, moves, and wears under everyday clothing.
Mass & Slim Anti-Cellulite Shapewear
How to Wear Them for Best Results
- Wear a pair for 8 hours a day — under your work clothes, errands outfit, or scrubs.
- At the end of the day, swap to the next clean pair and wash the one you wore.
- Repeat daily. With three in rotation, you always have a dry pair ready.
- Over 30 consistent days, the micro-massage supports circulation and smoother-looking skin.
Consistency is everything. The women who see the best results are the ones who never skip — which is exactly the problem three pairs solves.
Sizing Guidance
One size chart for the entire Mass & Slim collection. Order your true U.S. size; if you’re between two sizes, size up. All three pairs come in the size you select.
← 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 |
Composition: 53% Polyamide, 33% Polyester, 14% Elastane. Care: Machine washable and dryer safe; gentle cycle, cold water, low heat for longest wear.
Try the 3-Pack for 60 Days, Risk-Free
Wear them daily. Feel the shaping in the first few hours and see the difference over 30 days. If you don’t love the feel, fit, or results, return or exchange within 60 days.
✓ 60-Day Money-Back Guarantee · ✓ Free Size Exchanges · ✓ Trusted by Nurses and Moms Across the U.S.
Frequently Asked Questions
The leggings are clinically tested to show results with daily wear for 30 days. Three pairs let you wear a clean pair every day while the others are washed or drying — so laundry never interrupts your routine. You also save $64 versus buying three separately. Yes. All three pairs are the single size you select above. If you need mixed sizes, order single pairs in each size instead. You save $64 versus buying three single pairs — the discount is shown in the price above. Both use the same Tourmaline® technology. Choose leggings for full-length shaping and calf/ankle support under pants, jeans, and scrubs. Choose shorts for waist, hip, and upper-thigh shaping under dresses and skirts. Many women own both. The shaping effect is immediate. For visible improvement in the appearance of cellulite, wear them about 8 hours a day for 30 days. Most women notice changes within 4 weeks. Individual results may vary. Yes. The breathable, cooling fabric is built for extended wear — many customers, including nurses and drivers, wear them 8 to 12 hours daily. No. The seamless, high-waisted design sits smoothly under clothing with no visible lines or bulk. We offer 60-day risk-free returns and free size exchanges on the full set. If the fit isn’t right, we’ll make it right.Why buy three pairs instead of one?
Do all three pairs come in the same size?
How much do I save with the 3-Pack?
Should I get the leggings or the shorts?
How soon will I see results?
Can I wear them all day?
Will they show under my clothes?
What if the size isn’t right?
Ready to Start Your 30 Days?
Select your size above and add the 3-Pack to your cart — everything you need to wear them daily, comfortably, for the full routine.
60-Day Money-Back Guarantee · Free Size Exchanges · Secure Checkout
Explore the Mass & Slim Family
- Single Anti-Cellulite Leggings — try one pair first, or read the full technology and clinical detail.
- Anti-Cellulite Shorts 3-Pack — waist, hip, and upper-thigh shaping under dresses and skirts.
- Waist Shaper — targeted midsection support that pairs with anything.
- Read verified customer reviews
Mass & Slim Shorts 3-Pack
Anti-cellulite shapewear shorts 3-pack: one to wear, one in the wash, one ready
High-waisted, seamless shaping shorts with Tourmaline® beads embedded in the fabric. They smooth your waist, lift the buttocks and shape your hips and thighs, 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. With three pairs, you can wear them every day and never wait on the laundry.
- One size for all three pairs
- Free U.S. shipping, 3 to 4 business days
- Free size exchanges
- 60-day full refund, even if worn
- Helps smooth the appearance of cellulite with consistent wear*
- Visible results in 30 days*
- Smooths your waist and shapes your hips and thighs under dresses, jeans and scrubs
- Seamless and high-waisted, invisible under clothing, with no rolling, pinching or visible lines
- Breathable, cooling comfort for 8 to 12 hour wear
*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.
Not sure of your size? See the size chart. One size covers all three pairs.
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
The things you worry about, answered
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: one size covers all three pairs
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. All three pairs come in the size you select, so this one choice is the whole decision.
| 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.
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.
Plan your rotation
Why three pairs instead of one
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. With the anti-cellulite shapewear shorts 3-pack, a simple rotation keeps one pair always ready. They are machine washable and dryer safe.
1 pair
$87.95
$87.95 per pair
Want to try one pair first? Choose your size on the Shorts page.
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 separate pairs ($263.85)
- Free U.S. shipping and free size exchanges
Pick your size above and tap Add to cart.
Want a full set instead of three pairs of shorts? The Complete Shapewear Bundle (shorts, leggings and waist shaper) is $199.85.
Savings are measured against buying the same items one at a time at today's prices.
How the Tourmaline® micro-massage works
Hundreds of small Tourmaline® beads are embedded directly into the fabric. As you move through 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
How to wear them: wear one pair about 8 hours a day, every day, for 30 days. Rotate your three pairs through the wash. See the single Shorts page for more on the fabric.
Try the 3-Pack for 60 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. Shipping
*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.
Frequently asked questions
So you can wear them every day. One pair is on you, one is in the wash and one is ready for tomorrow. At $66.62 per pair, it is the best value per pair for daily wearers. Yes. All three pairs come in the one size you select. Order your true U.S. size, not smaller. Between sizes? Size up. The shaping is immediate. In the clinical study, women wore them 8 hours a day for 30 days and 73% saw a visible improvement in the appearance of cellulite.* Individual results may vary. 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. 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, you have a 60-day full refund, even if worn. U.S. shipping is free and takes 3 to 4 business days. No. It is a one-time purchase. There is nothing to cancel. 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.Why three pairs?
Do all three pairs come in the same size?
How soon will I see results?
Can I wear them all day?
What if they don't fit?
How fast does it ship?
Is this a subscription?
Are these good for nurses, moms and women 40+?
The Mass & Slim family
- Shapewear Shorts. One pair. Waist, hips and upper thighs. Best under dresses and skirts.
- 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.
Read all verified customer reviews
Material: 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.
