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Sontivia™ Organic Stretch Legging
$55.99 USD$99.99 USD
Color: Lake Blue
Size: S
Product Details
The Problem With What's Already In Your Drawer
Your Leggings Are Plastic. And You Wear Them the Worst Way Possible.
Skin-tight. Hot. Soaked in sweat. That's exactly how synthetic fabric sheds the most into your skin.
Most leggings aren't fabric — they're polyester, nylon, and elastane. Every squat and stretch grinds microscopic plastic fibers loose. Sweat acts like a solvent, pulling chemical additives like BPA out of the fabric. Hot, sweaty skin absorbs more than dry skin does.
For the sweatiest hour of your day, you're pressing plastic straight into your skin. Researchers have already found microplastics in blood, in placentas, in breast milk.
And most "plastic-free" brands still rub stretchy plastic right against your skin — they just hide it better.
The "Clean" Brands Aren't Clean Either
Plenty of cotton leggings on the market go see-through in a squat, thin out after a few washes, or still blend synthetic stretch fiber straight through the yarn — so it touches your skin the whole workout anyway. Trading one problem for another isn't a fix.
Meet Sontivia OutLock™
The Only Legging Built Cotton-Side In, Stretch-Side Out
Most brands spin plastic stretch fiber straight through the yarn, so it sits against your skin the whole workout. Sontivia builds two faces instead: pure plant fiber on the inside that touches you, and the 4% recycled stretch locked to the outside doing the work. Same snap-back. Same stay-put. Just not against your skin.
Sontivia Organic Stretch Legging + Free Scoop Bra
92% organic cotton · 4% TENCEL™ lyocell · 4% ROICA™ recycled elastane
Knit at 240 GSM — nearly twice as thick as most cotton leggings — with a gusseted, no-front-seam build so it stays opaque in a deep squat, not just standing still.
What Changes Once the Plastic's Gone
No plastic on your skin. 96% plant fiber, so you're not rubbing plastic into your skin every time you sweat.
The stretch stays off your skin. Plant fiber inside, the 4% stretch locked to the outer face.
No more see-throughs. Deep squats, big stretches, the front row of class — nothing shows through.
Nothing nasty inside. Third-party tested for PFAS and BPA. None found.
Gentle on your skin. Soft plant fiber and smooth seams — kind even to skin that reacts to everything.
Won't bag out or thin. The dense 240 GSM knit holds its shape wash after wash.
In Their Own Words
"I have eczema behind my knees and every legging I owned made it flare after the gym. Switched to these on a whim and it's basically gone. The cotton is soft and there's no scratchy seam."
— Mia Rodriguez, 26
"I've been burned by four other 'clean' brands that were see-through or fell apart. I read the lab report and did the bend-over test in my bathroom mirror. Nothing. They're staying."
— Jess T., 33
"I teach vinyasa 5 days a week. Deep folds, wide legs, all of it — fully covered. They breathe way better than my old leggings too, which surprised me."
— Priya S., 31
Sontivia vs. What's Already In Your Drawer
| Sontivia Set | "Clean" Cotton Brands | Regular Gym Leggings | |
| Made from organic plants | ✔ | Sometimes | ✘ |
| Opaque in a deep squat | ✔ | Often not | Varies |
| Stretch fiber kept off skin | ✔ | ✘ | ✘ |
| Lab-tested, PFAS & BPA free | ✔ | Rarely stated | ✘ |
| Won't bag out or thin | ✔ | Varies | Varies |
Size Chart — True to Size
Model is 5'8" and wears a size M. Free size exchanges if you land between sizes.
| Size | Waist | Hip | US Size |
| XS | 25.5–26.5" | 34.5–35.5" | 0–2 |
| S | 27.5–28.5" | 36.5–37.5" | 4–6 |
| M | 29.5–30.5" | 38.5–39.5" | 8–10 |
| L | 32.5–33.5" | 41.5–42.5" | 12–14 |
| XL | 35.5–36.5" | 44.5–45.5" | 16–18 |
| 2XL | 38.5–39.5" | 47.5–48.5" | 20 |
Your Questions, Answered
Are they actually plastic-free?
The part against your skin is 100% plant — soft organic cotton and TENCEL. Outside, 4% recycled stretch is blended in so they move with you instead of bagging out. Every gram is named on the label.
Will they be see-through when I bend over?
No. Knit at 240 GSM — nearly twice as thick as most cotton leggings — with no front seam. If a pair is ever sheer, it's replaced free.
Do they run small? What size should I get?
They fit true to size — order your usual size. See the size chart above. If you land between sizes, exchanges are free.
Won't cotton get sweaty and hold odor?
The TENCEL in the blend breathes and moves moisture, so they air out easily between wears — no chemical smell like synthetics carry.
Will they last, or thin out like other cotton leggings?
That's the point of the dense 240 GSM knit — it holds its shape instead of thinning. Wash cold and air-dry (skip the dryer) and they stay opaque for years.
Is the microplastics concern actually real?
Synthetic fabrics do shed microplastics, and researchers have found those particles in human tissue, with additives able to absorb through sweaty skin. Organic cotton and plant fibers are a safer bet against that exposure.
What if they don't work for me?
You've got 90 days. Wear them, wash them, squat-check them. If they're ever see-through, saggy, or not right, they'll be exchanged or refunded in full.
Try It Without the Risk
96% organic plants. GOTS-certified cotton. OEKO-TEX® certified fabrics and dyes. Third-party tested BPA, PFAS and phthalate free. 90-day money-back guarantee. Free exchanges. Small business in the US.
$59.99
Includes matching free sports bra for a limited time
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