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PureFlex Organic Cotton Athleisure Shirt

Sale price$52.00
  • 92% buttery-soft organic cotton and 8% spandex
  • Made for everyday wear and low-impact movement
Size:
Sizing Chart

Measurements

All measurements are body measurements, in inches.

Size Bust Waist Hips
XS (0-2) 30-32 24-26 34-36
Small (2-4) 32-34 26-28 36-38
Medium (6-8) 34-36 28-30 38-40
Large (10-12) 36-38 30-32 40-42
XL (14-16) 39-40 32-34 42-44
XXL (18-20) 41-43 35-37 45-47

Leggings and shorts lengths

Inseam is measured on the finished garment from the crotch seam to the hem. It's the same in every size, so you choose your size and your length separately.

Style Short Regular Tall
High Waist, Pocket, Mid-Rise, Sculpt and No-Front-Seam leggings 23" 25" 28"
Bootcut leggings 27" 29.5" 32"
Capri leggings 17"
High Waist and Pocket shorts 3" 5"

Which length for your height

A guide to where the hem lands, barefoot. Full length sits at the ankle; 7/8 sits just above it.

Your height Leggings (23" / 25" / 28") Bootcut
Up to 5'1" Short 23" for full length Short 27"
5'2"–5'4" Regular 25" for full length, or Short 23" as a 7/8 Regular 29.5"
5'5" Tall 28" for full length, or Regular 25" as a 7/8 Regular 29.5"
5'6"–5'9" Tall 28" for full length, or Regular 25" as a 7/8 Tall 32"
5'10" and up Tall 28" sits just above the ankle Tall 32"

Capri 17" is a mid-calf crop on most heights. Between two lengths? The longer one gathers slightly at the ankle; the shorter one sits as a 7/8.

How to choose your size

Most styles run true to size. PureFlex and Pure are garment dyed and pre-shrunk, so choose the size you normally wear.

If you're between sizes, please size up for the best fit.

Need a different length? Change the inseam, not the size. Leggings come in three inseams and shorts in two, so a shorter inseam at your true size will fit better than a smaller size.

Shorts: check the measurements at your hip rather than the size you usually wear in shorts.

Bras and tops: your usual size for a secure fit, or size up if you prefer less compression.

Pure Lightweight Joggers: these fit closer than the name suggests. If you want a relaxed fit, size up.

Texas-Grown and EcoLuxe styles: use the measurements on the chart above.

Still deciding between two sizes? Email hello@purakai.com and we will help.

How to measure

Bust: around the fullest part of your chest, with the tape flat but not tight.

Waist: around your natural waist, where you usually wear your pants. Relax and leave about 1/4 inch of slack.

Hips: around the widest part of your hips and seat, usually about 2 inches below your hip bones.

Inside leg: from your crotch straight down to where you want the hem, barefoot. Compare it with the inseams above.

Color:Black
Free 30-Day Returns & Exchanges

Wear Better. Save More. 15% off 2 • 20% off 3 • 25% off 4+
Discounts apply automatically at checkout.

Mandy W.Verified
1/4
3/16/2026
I absolutely love this top! It's thick and compressive which feels very flattering and supportive while I'm doing strength and HIIT workouts.
Miranda M.Verified
2/4
12/22/2025
Love this shirt! It's exactly what I wanted it to be. It's not tight on my arms. The fabric is thick and has the right amount of stretch for me.
Morgan O.Verified
3/4
4/24/2026
Definitely add this on when you buy the leggings, the perfect set for day to day!! Love how fitted and comfortable this is.
Ellissa B.Verified
4/4
5/2/2026
The shirt is very comfortable and great quality fabric. Happy to have something natural to work out in.
PureFlex Organic Cotton Athleisure Shirt - Black
PureFlex Organic Cotton Athleisure Shirt Sale price$52.00
Independently tested for PFAS by Applied Technical Services, an independent testing laboratory: no PFAS detected, with total fluorine below 2 parts per million (October 2024).

Tested and Trusted

We had our bestselling leggings independently tested for PFAS by Applied Technical Services. Total fluorine, the limiting marker for the entire PFAS class, came back none detected at below 2 parts per million.

The report covers the main fabric of our organic cotton leggings, tested in October 2024, against a current industry threshold of 100 ppm. We publish the result rather than a blanket claim.

Why go the extra mile? PFAS are synthetic chemicals used to make fabrics stain and water-resistant, but they’re also known as “forever chemicals” because they persist in the environment and accumulate in our bodies. With PFAS linked to health risks, we made it our goal to guarantee skin-friendly comfort that eases your body and mind.

We use no DWR coatings and no fluorinated finishes anywhere in our line.

Frequently Asked Questions

Recently viewed

Customer Reviews

Overall rating: 4.6 / 5 from 19 reviews.

The material is beautiful and soft. Love how it fits too. I hate to say it, but I wish that you had a logo on it. It's so nice that I want to brag about it and let it be known.

PureFlex Organic Cotton Athleisure Shirt

It's an awesome shirt! So form fitting and lovely. I didnt expect it to feel like it does- it almost doesn’t feel like cotton. If I didn't know where I purchased it from, I might have mistaken it for lululemon!Lululemon!

PureFlex Organic Cotton Athleisure Shirt

My first time ordering and I must say I love the top and the leggings too! Thanks so much for making non toxic workout clothes that feel and look great!

PureFlex Organic Cotton Athleisure Shirt

Definitely add this on when you buy the leggings, the perfect set for day to day!! Love how fitted and comfortable this is. My new favorite set for sure.

Ecoflex 2.0 Organic Cotton Athleisure Shirt

I absolutely love this top! It’s thick and compressive which feels very flattering and supportive while I’m doing strength and hiit workouts. Just what I’ve been searching for since leaving the synthetic workout attire world. I’m hopeful for more colors so I can stock up!

Ecoflex 2.0 Organic Cotton Athleisure Shirt

Love this shirt! It’s exactly what I wanted it to be. It’s not tight on my arms. The fabric is thick and has the right amount of stretch for me.

Ecoflex 2.0 Organic Cotton Athleisure Shirt

Customer photo review of Ecoflex 2.0 Organic Cotton Athleisure Shirt

I LOVE these shirts! They're like if Skims were organic cotton. See my try-on haul; sizing details; a wear test for strength, hot pilates, and yoga; and how it washes up here: https://youtu.be/o3bpL889IZY?si=pom_OVJDw-MS4_e0

Ecoflex 2.0 Organic Cotton Athleisure Shirt

This shirt is VERY fitted. I bought an XL and it is similar to most mediums. The weight. In my opinion. is a bit too heavy for serious work outs.

PureFlex Organic Cotton Athleisure Shirt

Unfortunately these shirts are way too thick to be comfortable for working out in. The material is soft and high quality, but I think a thinner weight and boxier cut would feel a lot less restrictive and breathable. A breezy tank top version would also be great!

Ecoflex 2.0 Organic Cotton Athleisure Shirt