Fox Head Men's First Layer Sleeveless Jersey 91% POLYESTER/9% SPANDEX WITH YARN WICKING Imported 4-way stretch fabric improves mobility while maintaining shape Fitted Under layer garment keeps you comfortable without weighing you down Wicking Polyester fabric pulls moisture away from your skin to keep you drier and more comfortable Flat lock constructed seams help prevent chafing in critical areas 4-way stretch fabric improves mobility while maintaining shape