Universal Textiles Mens Boxer Shorts Underwear Small to Extra Large Sizes (Pack of 3) Cotton, Polyester, Sizes S, M, L, XL, XXL and Extra Large Sizes. Great quality mens boxer shorts. Our boxer range is manufactured using a poly cotton blend to provide comfort. Boxers come with durable stitching and wider elastic. Fiber contents 50% Cotton and 50% Polyester.