You’re looking at a modern fit blend of cotton and polyester. This shirt is not only really comfortable, but also extremely affordable if you are looking to an alternative to one of the more basic brand options!• Most colors are a blend of 52% ring-spun cotton and 48% polyester. The "Prism" shades are a 99% to 1% cotton:polyester blend however• Most colors are available in sizes Adult XS through Adult 3XL (some are available up to 5XL)