This T-shirt is made from lightweight Micro-fresh polyester with 4-way stretch so it moves with your body when running or working out. Active perspiration control and antimicrobial treatment help to keep you feeling fresh as you pick up the pace on warm days. The fabric's compact microstructure keeps skin contact to a minimum to enhance the fabric's quick-drying properties. This T-shirt also features advanced UV protection to keep the worst of the sun’s rays off you. For summer fitness workouts and running, enjoy all-day comfort with the women's Topographic Sublime T-shirt.