100% Airlume combed and ring-spun cotton, 32 single 4.2 oz. (Ash – 99% Airlume combed and ring-spun cotton, 1% poly; Ath. Heather – 90% Airlume combed and ring-spun cotton, 10% poly; Heather colors – 52% Airlume combed and ring-spun cotton, 48% poly)