4.2 oz., 100% airlume combed and ringspun cotton, 32 singles Athletic Heather is 90/10 airlume combed and ringspun cotton/polyester Dark Grey Heather is 52/48 airlume combed and ringspun cotton/polyester Neon colors are 3.6 oz., 52/48 airlume combed and ringspun cotton/polyester, 40 singles Unisex sizing Retail fit Side seams Tear-away label