100% Cotton vs Cotton/Elastane

100% cotton or cotton/elastane? How to actually decide

Sooner or later, every brand developing custom T-shirts hits this fork: keep it 100% cotton, or add a few percent of elastane. Both roads work. They just build different shirts, and the wrong pick shows up in returns, not in the sample room.

1. 100% cotton: the default that earns its place

Cotton's natural hand and breathability are why it's been the T-shirt standard for a century, and most of your lineup probably belongs here: everyday basics, heavyweight tees, streetwear, premium casual.

But read the label carefully. "100% Cotton" covers everything from rough open-end promo shirts to supima single jersey, and the difference is in what the label doesn't say: combed or carded, staple length, ring-spun or not, and what GSM it's knitted at. Two "100% cotton" tees can be different products.

If natural fiber content and the classic cotton feel are part of your brand story, pure cotton isn't the safe choice. It's the right one.

2. Cotton/elastane: what a few percent buys you

A small elastane dose, usually 4–5% (96/4 or 95/5 blends are typical), changes how the shirt wears. It stretches, it recovers, and it comes out of the wash looking like it did going in. For fitted silhouettes, fashion basics, and anything movement-driven, that's hard to replicate with pure cotton.

The trade is complexity. Elastane constrains your dyeing and finishing choices, reacts differently to high heat, and behaves differently in washing and production. None of this is unmanageable, but it needs to be planned for, which is why the blend percentage should never be spec'd in isolation from the rest of the fabric system.

3. Making the call

Match the fabric to the product:

- 100% cotton when natural content, breathability, and classic construction drive the purchase.

- Cotton/elastane when the fit is close, the silhouette is the product, and shape recovery matters after repeated washing.

Then evaluate the whole spec: fiber quality, yarn, GSM, construction, stretch and recovery, finishing, climate, end use. The fabric that wins is the one that fits the shirt you're actually building, not the one with the better-sounding fiber story.