100% Cotton, Gray Shirts are 93% Cotton 7% Poly 100% Cotton Machine Wash Cool/Tumble Dry Low Officially licensed NCAA garment Screenprinted with school name and logo in the USA Casual Tee to show off your school spirit in this Wes and Willy 100% Organic Cotton Tee! Gray shirts are 93% Organic Cotton 7% Recycled Polyester.