Canvas 3001 30s T-Shirt 10% polyester 4.2 oz., 100% combed and ringspun cotton; 30 singles Ash is 99% combed ringspun cotton, 1% polyester Athletic Heather is 90% combed ringspun cotton, 10% polyester all other Heather/Blend colors are 52% combed ringspun cotton, 48% polyester unisex sizing; retail fit