Made from specially spun fibers that make very strong and smooth fabric. 50% Cotton 50% Polyester and the medium-heavy fabric (8.0 oz/yd² (271.25 g/m²). Solid colors are 100% cotton, heather colors are 52% cotton, 48% polyester (Athletic Heather and Black Heather are 90% cotton, 10% polyester) Fabric is made from specially spun fibers that make very strong and smooth fabric. Solid colors are 100% cotton Heather colors are 50% cotton, 50% polyester (Sport Grey is 90% cotton, 10% polyester) Antique colors are 60% cotton, 40% polyester. High-quality print adds a statement to one's workout or everyday routine. Comfortable and light, this premium product is the best choice. Relaxed, tailored and ultra-comfortable, you'll love the way you look in this durable, reliable classic.