Product Details + 4.2 oz., 100%airlume combed and ring spun cotton, 32 singlesAthletic Heather and Black Heather are 90/10airlume combed and ring spun cotton/polyesterAlternate Heather Colors are 52/48airlumecombed and ring spun cotton/polyesterTriblends are 3.8 oz., 50/25/25 polyester/airlumecombed and ring spuncotton/rayon, 40 singlesUnisex sizing