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/polyesterAlternate 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 fitShoulder to shoulder taping Unisex sizingTearaway label