4.2 oz., 100% airlume combed and ringspun cotton, 32 singles; Ash is 99% airlume combed and ringspun cotton, 1% polyester; Athletic Heather is 90% airlume combed and ringspun cotton, 10% polyester; All other heather colors are 52% airlume combed and ringspun cotton, 48% polyest; retail fit; unisex sizing; side-seamed; tear away label ; pre-shrunk;