4.2 oz., 100% airlume  combed and ringspun cotton, 32 singles Athletic Heather and Black Heather are 90/10  airlume combed and ringspun cotton/polyester  Ash is 99/1  airlume  combed and ringspun cotton/polyester Alternate Heather CVC/Blend colors are 52/48  airlume combed and ringspun cotton/polyester  Heather Prism colors are 99/1 airlume combed and ringspun cotton/ polyester (Unique coloring, grey flecks of heather pulled through the base color) Side seams, retail fit Shoulder to shoulder taping Unisex sizing Tearaway label