DITCH YOUR TOXIC PLASTIC ACTIVEWEAR

try sontivia's organic cotton leggings instead.

Shop ActiveWear

Organic
Cotton

No Toxic
Chemicals

Fully 

Squat proof

Naturally
Breathable

the only activewear
not made from plastic

Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings
Sontivia Organic Cotton Leggings

4.8/5 based on 4,532 happy customers

Sontivia Organic Cotton Leggings

+FREE sports bra

Squat-proof - never see through

Made of organic plants, not plastic

No forever chemicals, no BPA

Won't bag out or thin
Color
Size

90-Day Money Back Guarantee

Small Business in US

Free Shipping

Loved By Thousands

Description

  • 92% organic cotton, 4% TENCEL™ lyocell & 4% ROICA™ recycled elastane — legging + matching bra
  • Organic cotton from GOTS-certified sources
  • OEKO-TEX® Standard 100 certified fabrics & dyes
  • Our fabrics are 3rd party tested BPA, PFAS and phthalate free.
  • Knit at 240 GSM with a gusseted, no-front-seam construction - so it stays fully opaque in a deep squat, not just standing still.

Enough sweating into plastic five days a week. Switch to the Sontivia Set — made of plants, and built dense enough to bend over in.

 

Guaranteed to be the last legging you ever squat-check in the mirror.

Size Chart

Please note that we provide Free Exchanges (including the free return label).

 

The Core Legging — body measurements (inches), waist / hip / US size:

XS — waist 25.5–26.5", hip 34.5–35.5", US 0–2

S — waist 27.5–28.5", hip 36.5–37.5", US 4–6

M — waist 29.5–30.5", hip 38.5–39.5", US 8–10

L — waist 32.5–33.5", hip 41.5–42.5", US 12–14

XL — waist 35.5–36.5", hip 44.5–45.5", US 16–18

2XL — waist 38.5–39.5", hip 47.5–48.5", US 20

 

The Scoop Bra — body measurements (inches), bust / waist / hip / US size:

XS — bust 32.25–33.25", waist 25.5–26.5", hip 34.5–35.5", US 0–2

S — bust 34.25–35.25", waist 27.5–28.5", hip 36.5–37.5", US 4–6

M — bust 36.35–37.25", waist 29.5–30.5", hip 38.5–39.5", US 8–10

L — bust 39.25–40.25", waist 32.5–33.5", hip 41.5–42.5", US 12–14

XL — bust 42.25–43.25", waist 35.5–36.5", hip 44.5–45.5", US 16–18

2XL — bust 45.25–46.25", waist 38.5–39.5", hip 47.5–48.5", US 20

 

Our model is 5'8" and wears a size M.

Materials & Care

Legging: 92% organic cotton, 4% TENCEL™ lyocell, 4% ROICA™ recycled elastane

 

Bra: 92% organic cotton, 4% TENCEL™ lyocell, 4% ROICA™ recycled elastane

 

Care Instructions: Machine wash cold, inside out, on the gentlest setting available. Gentle washing protects the density and recovery that keep it opaque.

 

Lay flat to dry. Do not tumble dry.

 

Wash only when needed - TENCEL™ lyocell breathes and wicks moisture, so it airs out easily between wears and lasts for years!

90 Day Guarantee

Not the right fit? We offer free size exchanges.

 

If you don't love it, return it in 90 days for a full refund.

96% Plants

No Front Seam

GOTS Organic Cotton

240 GSM — Twice As Thick

Cool & Breathable

what happens once the plastic's gone

Don't take our word for it. Hear from women who switched - and never looked back at their old drawer.

Sontivia vs. What's in your Drawer right now

The Sontivia Set

"Clean" cotton brands

Regular gym leggings

Made from organic plants

Opaque in deep squat

No hidden spandex

Lab-tested, PFAS-free

Ethically & fairly sourced

Won't bag out or thin

Shop Natural Fiber ActiveWear

THE PROBLEM

what's so bad about plastic in leggings?

Literally made of plastic

Polyester is PLASTIC. You likely try to avoid plastic - so do you really want to wear clothes made of 100% plastic?

Toxic chemicals

Polyester may contain toxic chemicals - which are often used in the manufacturing process & finishing process.

Sheds tons of microplastics

When you wear polyester, microplastics shed from the fabric into the air around you.

BPA and "forever chemicals"

These "forever chemicals" can leach into our water supply (and your skin).

Sweat makes it worse

You wear leggings for hours a day, pressed tight against your skin. Your body absorbs what's in that fabric (Microplastics).

THE SOLUTION

Meet The Only Legging That's Cotton, Not Plastic

Polyester sheds tiny bits of plastic as you sweat and move. Ours is 96% organic plants, so it doesn't. Here's what changes.

No plastic on your skin. It's 96% plants, so you're not rubbing plastic into your skin every time you sweat.

The stretch stays off your skin. Plant fiber on the inside, the 4% stretch -outside, never touching you.

No more see-throughs. Deep squats, big stretches, the front row of class — nothing ever shows through.

Nothing nasty inside. Tested for PFAS and BPA. None found. No mystery chemicals, no chemical smell.

Gentle on your skin. Soft plant fiber and smooth seams — kind even to skin that reacts to everything.

Try it Now

Hey! I'm Shelby!
Founder of Sontivia

It all started from one night when I read the tag on my leggings. 88% polyester (plastic). 

That messed with me. I spent the next two years trying every organic and sustainable legging I could find. They all went see-through when I bent over. Or sagged after two washes. Or were secretly still mostly plastic. I wasted THOUSANDS on returns.  So I decided to just make them myself.

Building it from nothing.

I started sourcing fabrics from everywhere I could find. I ordered sample after sample - testing different weights, different knits, different blends. Every time one arrived I'd sew a test pair and do the squat test in my bathroom mirror. Too thin. See-through. Too stiff. Wrong texture. 38 samples tested. Every single one failed.

 

39th was different. Stretchier. Denser. I put them on, squatted, and checked. Nothing showed through. I'm not going to lie - I teared up a little.

From my kitchen table to here.

I sewed the first batch myself in California. Packed orders by hand. Now over 4,500 women have ordered. We've sold out twice. Just moved into a real office. I still ship orders, read every review, and we still sew everything myself right here in California.

 

To everyone who took a chance on my activewear - i couldn't be more thankful <3

You got Questions
We Got Answers

Everything you're wondering, before you switch.

Are they actually plastic-free?

The part against your skin is 100% plant — soft organic cotton and TENCEL, no plastic where it touches you. Outside, we blended in 4% recycled stretch so they move with you and spring back instead of bagging out. Every gram's named right on the label.

Will they be see-through when I bend over?

No. They're knit at 240 GSM — nearly twice as thick as most cotton leggings — with no front seam. We filmed the deep-squat test in our lightest color and nothing shows. If a pair is ever sheer, we'll replace it free.

Do they run small? What size should I get?

They fit true to size — order your usual size, no sizing up. Here's a full size chart with real measurements:

 

The Core Legging — body measurements (inches), waist / hip / US size:

XS — waist 25.5–26.5", hip 34.5–35.5", US 0–2

S — waist 27.5–28.5", hip 36.5–37.5", US 4–6

M — waist 29.5–30.5", hip 38.5–39.5", US 8–10

L — waist 32.5–33.5", hip 41.5–42.5", US 12–14

XL — waist 35.5–36.5", hip 44.5–45.5", US 16–18

2XL — waist 38.5–39.5", hip 47.5–48.5", US 20

 

The Scoop Bra — body measurements (inches), bust / waist / hip / US size:

XS — bust 32.25–33.25", waist 25.5–26.5", hip 34.5–35.5", US 0–2

S — bust 34.25–35.25", waist 27.5–28.5", hip 36.5–37.5", US 4–6

M — bust 36.35–37.25", waist 29.5–30.5", hip 38.5–39.5", US 8–10

L — bust 39.25–40.25", waist 32.5–33.5", hip 41.5–42.5", US 12–14

XL — bust 42.25–43.25", waist 35.5–36.5", hip 44.5–45.5", US 16–18

2XL — bust 45.25–46.25", waist 38.5–39.5", hip 47.5–48.5", US 20

 

And if you land between sizes, exchanges are always free.

Won't cotton get all sweaty and hold odor?

The TENCEL in the blend breathes and moves moisture, so they air out easily between wears. Cotton isn't magic — but it beats sweating into hot plastic, and there's no chemical smell like synthetics have.

Will they last, or thin out like other cotton leggings?

That's the whole point of the thick 240 GSM knit — it holds its shape instead of bagging out or going thin. Wash cold and air-dry (skip the dryer) and they'll stay opaque for years.

Is the microplastics thing actually real?

The proven parts are: synthetic fabrics shed microplastics, those particles show up in human tissue, and additives can absorb through sweaty skin. That's why organtic cotton & plants are a way safer bet.

Is the Set worth the price?

You'll wear these more hours than almost anything you own, against your most absorptive skin. Priced per wear it's tiny — and they're built to last years, not land in the bin after three months. Cheap leggings cost more twice.

What if they don't work for me?

Then you don't pay. You've got 90 days. Wear them, wash them, squat in them in the mirror. If they're ever see-through, saggy, or just not right, we'll exchange them or refund you fully. The risk is ours.

Plastics out. Smile's in.

4.8/5 based on 4,532 happy customers

4.8/5 based on 4,532 happy customers

OUR 90-DAY CLEAN-FABRIC GUARANTEE

If you're not fully convinced these are the cleanest leggings you've worn within 90 days, you pay nothing.

 

No hoops. No hassle. Just a full refund — no questions asked. We're confident enough in 96% plants, third-party lab-tested and named to the gram, that we take on all the risk, so you don't have to.

Try it Now