Bioworld Men's Batman Bat Signal T-Shirt, Soft Black Heather, 2XL Black is 100% Cotton. Heather Gray and Soft Black Heather are soft, smooth, lightweight Cotton/Polyester Blends. Machine washable. "Preshrunk" makes the fabric less likely to shrink, but it doesn't mean it won't shrink again, so dry low or air dry. Bioworld Men's Batman Bat Signal T-Shirt, Soft Black Heather, 2XL