*Heather colors are 52% combed and ring-spun cotton/48% polyester. Athletic and Black Heather are 90% combed and ring-spun cotton/10% polyester. Ash color is 99% Airlume combed and ring-spun cotton and 1% poly. Heather Prism Ice Blue is 52% Airlume combed cotton / 48% polyester rest of the Prism colors are 99% Airlume combed and ring-spun cotton and 1% poly.