Is all-over print always polyester? No — but usually yes
Same colour, same light, same magnification. Cotton on the left takes light into the spun fibre and stays matte. Polyester on the right throws it back off a smooth filament — that sheen is the difference you see across a room, and feel after an hour of wear.
If you have bought an all-over printed shirt before, there is a good chance it was polyester and felt like it. Slippery, slightly plasticky, warm in the wrong way, prone to holding smell. Many people conclude that all-over printing simply is that, the way many people concluded that printed graphics simply crack.
Both conclusions are about a method, not about the format.
Why almost all all-over print is polyester
The common way to cover a whole garment with an image is sublimation. Heat turns solid dye into gas, the gas bonds with polyester, and the colour becomes part of the plastic fibre. It works brilliantly — on polyester. On cotton it does essentially nothing, because there is nothing in cotton for sublimation dye to bond to.
So the fabric choice isn't a preference. It's a consequence: a manufacturer who prints by sublimation has to use synthetic fabric, and every all-over shirt they sell will be polyester regardless of what the customer would prefer to wear.
The other route
Reactive dye printing goes the other way. Reactive dye bonds covalently with cellulose — the material cotton is made of — and does nothing on polyester. It is how good cotton fabric has been coloured industrially for decades; we apply it to images instead of flat colour.
That is the whole trick behind our shirts: 100% cotton, printed edge to edge, because the dye chemistry matches the fibre.
How to tell what you're buying
Before the shirt arrives, the label is your only clue, so read it rather than the marketing copy:
- "100% polyester", "poly blend", "microfiber" with all-over print — sublimation.
- "100% cotton" with all-over print — reactive dye, or the print is not really all-over.
- "Cotton feel", "cotton touch", "cotton-like" — polyester. If it were cotton, the label would say cotton.
After it arrives, your hand tells you immediately. Sublimated polyester is smooth and cool with a slight synthetic slip. Reactive-printed cotton feels like a cotton shirt, because that is all it is — there is no layer between you and the fabric.
Which is actually better?
Depends on what you want, and there is no universal answer.
Polyester wins on price, on neon and fluorescent brightness, on drying speed, and on sportswear generally. If you are buying a running shirt, synthetic is the correct choice.
Cotton wins on breathability, on how it feels against skin over a long day, on smell, and on how it ages. It also takes deep saturated colour in a way that reads as fabric rather than as print.
What cotton cannot do: there is no white dye, so a light design on dark cotton is not possible the way it is on a printed synthetic; and true neon is out of reach for any dye that bonds to cotton.
The short version
All-over print is a format, not a material. Most of the market ties it to polyester because their printing method requires it. Ours doesn't, so we don't.