This shirt is 100% polyester. You couldn't tell from looking at a label since there are (illegally) no labels whatsoever other than the logo and size. This shirt feels like a plastic tarp or poncho to the skin, it doesnt breathe, it is obviously the most rigid polyester. The description says cotton, there is no cotton in this. ADDITIONALLY: As a Graphic Designer that retouches photos as part of my job, I should have noticed: there is a deliberate grain texture added to the photos of the fabric to fool you into believing it looks like Cotton (when it is pure plastic), you can look at the photos yourself, the texture goes over the models skin, and the models black pants, i shouldnt have to forensicly analyze a products photos for forgery just to buy a shirt. Dishonest company. Returning