You've seen the trend: "what I ordered" next to "what I got." Usually it's a punchline about a bad Shein order. Mine went the other way — I expected another plain black activewear set. What I got was a lot more than that.
What I ordered
On paper it looked like any other set: black leggings, a square-neck crop top. Nothing about the product photos told me what was different about it. That's kind of the problem with activewear shopping — the difference between a toxic set and a clean one almost never shows up in a photo.
What I actually got
The difference is in what's not in the fabric:
- No toxins — no chlorine bleach, no formaldehyde, no toxic azo dyes in the finishing process.
- No PFAS— more on why that one matters below.
- No harmful chemicals — GOTS certification audits the entire supply chain, not just the finished garment.
- 90% organic cotton — grown without synthetic pesticides or fertilisers.
- Breathable softness — cotton against skin, not a plastic-based finish.
- Squat-proof thickness — a fabric weight that doesn't go sheer the second you move.
Why "no PFAS" is worth paying attention to
PFAS — "forever chemicals" — are used in a lot of activewear as a durable water-repellent or moisture-wicking finish. Testing by Mamavation and Environmental Health News found detectable PFAS in roughly a quarter of leggings and yoga pants sampled, including from well-known brands. These compounds don't break down in the environment or the body, and they've been linked to fertility issues, developmental effects, and increased cancer risk with long-term exposure.
Here's the part that connects back to something we've written about before: sweat dramatically increases how much your skin absorbs from what's touching it — in lab conditions, dermal absorption has been measured at over 3,000 times higher on sweaty skin than dry skin. Activewear is worn during exactly that condition. If a PFAS-finished garment is against your skin while you're sweating, that's the worst-case scenario for exposure, not the best.
Squat-proof matters as much as non-toxic
None of this matters if the leggings go see-through the first time you squat. "Squat-proof thickness" isn't a throwaway line — it's the fabric weight and knit density that keeps 90% organic cotton opaque under stretch, so you're not trading performance for a clean ingredient list.
This is the same 90% GOTS-certified organic cotton, 10% polyester build we use across the whole collection — the polyester is there for stretch and recovery, not as a coating. If you want the full breakdown of what's in most activewear and why that ratio matters, read Nylon vs Polyester: What's in Your Activewear? and Is Your Activewear Plastic?
Shop the organic activewear collection — shop now →
Sources: Environmental Working Group, PFAS testing in yoga pants and textiles; PFAS Central, forever chemicals in workout wear.