This class t-shirt is soft and light, with just the right amount of stretch. It's one of our crowd favorites; comfortable and the unisex cut is flattering for both men and women. Heather colors are 52% combed and ring-spun cotton/48% polyester. Athletic and Black Heather are 90% combed and ring-spun cotton/10% polyester. Prism colors are 99% Airlume combed and ring-spun cotton and 1% poly.