Solid Colors: 100% Airlume combed and ring-spun cotton, 32 single 4.2 oz. (Ash - 99% Airlume combed and ring-spun cotton 1% poly) Heather CVC/Blend Colors: 52% Airlume combed and ring-spun cotton 48% poly (Ath. Heather - 90% Airlume combed and ring-spun cotton 10% poly) Black Heather CVC: 90% Airlume combed and ring-spun cotton 10% poly