This men's reliable t-shirt has a classic fit that's durable and stylish. It's comfortable, motivational, and bound to fit all of your outdoor needs! (100% cotton. Sport Grey is 90% cotton, 10% polyester. Ash Grey is 99% cotton, 1% polyester. Heather colors are 50% cotton, 50% polyester. Fabric weight: 5. 0–5. 3 oz/yd² (170–180 g/m²)