Bella + Canvas Unisex Poly-Cotton Short-Sleeve T-Shirt (3650) BLACK SPECKLED 50% poly 3.6 oz., 52% combed and ringspun cotton, 48% polyester Marble colors are 91% polyester, 9%combed ringspun cotton, 30 singles, 4 oz. Acid wash colors - 52% combed ringspun cotton, 48% poly, 30 singles, 4.2 oz. 40 singles