GREENWASHING
Why a 100% cotton sports legging does not exist
Cotton fibre has almost no inherent elasticity. Under load it stretches a little and largely stays there, it does not snap back. That is a property of the cellulose fibre structure, not an opinion about a brand.
A genuinely pure 100% cotton legging:
- Bags at the knees within an hour of wear
- Loses shape after a wash or two
- Gives no waistband compression
- Sags at the seat after repeated bending
- Cannot hold up through squats, lunges or deep yoga poses
To behave like activewear, the fabric needs an elastic fibre that returns to length after every stretch. In practice that is elastane (spandex), and the functional minimum sits around 6 to 10% of the composition. Below that you do not get reliable recovery, above roughly 10 to 20% you are into strong compression wear.
So when a stretch legging is marketed as "100% organic cotton," one of two things is true:
The claim is incomplete. The sewn composition tag lists elastane (or another synthetic) the marketing left out. This is the common case.
It genuinely is 100% cotton. In which case it bags and sags, and is not really a functional sports legging. Rare in a product actually sold as activewear.
Either way, the front-of-tag claim is not the whole garment.
What the elastane actually is, and why it is not "natural"
It is worth being straight about the fibre doing the work, because pretending it is not there is its own kind of greenwashing.
Elastane is a synthetic. It is a segmented polyurethane, built by reacting diisocyanates (aromatic isocyanate chemistry) with a polyol to form long chains with alternating rigid and rubbery segments, then dry-spun into filament, typically through a solution in the solvent dimethylformamide (DMF). The rubbery segments are what let the fibre stretch to several times its length and recover. None of that is clean, plant-based chemistry, and no honest label should imply it is.
What makes a small amount of it defensible in a legging is quantity and placement. In a well-made cotton-elastane fabric the elastane is not woven bare across your skin. The elastane filament is fed under tension into the centre of the spinning frame and wrapped in cotton fibres, a core-spun yarn, so the synthetic sits in the yarn core and cotton faces the skin. That is why an 8% elastane legging still feels like cotton. But 8% is still 8%. It is real, it is synthetic, and it is why "100% cotton" on that garment is false.
The nuance most articles get wrong: organic and stretchy at once
Here is the part that complicates the lazy "if it stretches it can't be organic" take. It can.
GOTS, the strictest textile standard, permits sportswear and leggings to contain up to 25% synthetic fibre (elastane included) and still carry the certified organic label, precisely because these garments need stretch to function. So a 92% organic cotton, 8% elastane legging can be genuinely, auditably GOTS-certified organic.
What that garment still cannot honestly say is "100% organic cotton", because the 8% elastane exists. The takeaway is not "stretch equals fake". It is that "organic" and "100% cotton" are two different claims, and a stretch legging can legitimately earn the first while it is physically barred from the second. The overclaim to distrust is the "100%", not the stretch.
How to read a hangtag claim accurately
The regulated information is the fibre-percentage list on the sewn-in care label. EU law (Textile Regulation 1007/2011) and US law (Textile Fiber Products Identification Act) both require every fibre and its percentage to be listed there, with small legal tolerances. The hangtag, website copy and product page are marketing, and are not held to the same completeness standard.
Common claims and what they actually mean:
"100% organic cotton" on a stretch legging. The real composition is almost certainly cotton plus elastane. Find the sewn tag.
"Made with organic cotton." Some of the cotton is organic. The share can be small. The rest of the composition is unstated. Deliberately vague.
"Organic cotton blend." Contains some organic cotton mixed with other fibres or conventional cotton. No percentages implied.
"Sustainably made with organic cotton." Says nothing measurable about either organic content or sustainability. "Sustainable", "eco" and "conscious" are unregulated words.
"92% organic cotton, 8% elastane." Full composition. This is the honest format.
When the hangtag and the sewn tag disagree on completeness, the sewn tag wins. It is the regulated document.
What "made with" actually allows
Under most textile labelling regimes a brand can say "made with organic cotton" once the garment contains organic cotton above a low threshold. A garment that is mostly polyester with a minority of organic cotton can still run the phrase. The claim is technically true, the garment is functionally synthetic.
That gap is what produces the cleanest-sounding copy on some of the least-clean garments. Reading the sewn composition tag is the only reliable defence, and it is why a specific percentage always beats a warm adjective.
Where LAINE HILL sits
LAINE HILL labels "92% organic cotton, 8% elastane" upfront, hangtag and sewn tag agreeing. The 8% elastane is necessary for the legging to function, it is core-spun so it sits inside the yarn rather than on your skin, and we are not going to erase it from the marketing to make the copy read cleaner.
We are not yet GOTS-certified. That certification is on our roadmap as the brand scales, and until we hold it we will not imply it, even though our target composition would sit comfortably inside what GOTS permits for sportswear. Our processing standards are built to meet what GOTS audits (no PFAS, no formaldehyde, no restricted dyes), but a standard we are building toward is not a certificate we hold, and we will not blur the two.
The honest label is not as clean-looking as "100% organic cotton". It is more accurate. For anyone buying clean activewear specifically to know what sits against their skin, accuracy is the whole point.
Common questions
Can a stretch legging really be 100% organic cotton?
Not if it stretches and recovers like activewear. Cotton elongates under load and stays elongated, it does not spring back. A legging that genuinely holds compression and shape has an elastic fibre in it, usually elastane at around 6 to 10%. So "100% organic cotton" on a garment with real stretch means either the synthetic is being left off the marketing, or it does not actually function as a sports legging.
What does "made with organic cotton" mean?
It usually means some of the cotton is organic-certified, but the share can run anywhere from a low single-digit threshold up to most of the garment. The rest can be conventional cotton, polyester or other fibres with no organic status. The claim is technically accurate while leaving most of the composition unstated, which is exactly why it is popular.
How do I read the back of the label correctly?
The sewn-in composition tag legally must list every fibre and its percentage, in the EU under the Textile Regulation 1007/2011, in the US under the Textile Fiber Products Identification Act. Find that tag, read every line, and compare it to the hangtag marketing. If the front says "100% organic" and the sewn tag lists elastane, the sewn tag is the accurate one.
Is a cotton-elastane legging automatically not organic then?
No, and this is the nuance most articles miss. GOTS allows sportswear and leggings to contain up to 25% synthetic fibre and still carry the organic label, so a 92% organic cotton / 8% elastane legging can be genuinely GOTS-certified. What it cannot honestly claim is "100% organic cotton", because the elastane is real. Honest and certified is possible, "100%" on a stretch garment is not.
