Men's HeatGear&reg; Compression Long Sleeve T-Shirt New ergonomic fit adds to an overall comfort by reducing abrasion in high impact areas Anti-Odor Technology prevents the growth of odor causing microbes HeatGear moisture transport ensures fast drying performance that keeps you cool and won't weigh you down UPF 30+ protects your skin from the sun's harmful rays and inhibits premature aging Polyester