Under Armour Women's Iso-Chill Shore Break Long Sleeve Casual Shirt - UA flattened out the fibers and added some science to create a game-changing fabric that quickly pulls heat away from the skin-keeping you calm, cool, and crushing at max capacity. UPF 50+ to protect from harmful sun rays Sweat-wicking quick-drying material Articulated sleeves for unrestricted movement Iso-Chill fabric helps disperse body heat making it feel cool to the touch 100% Polyester Style: 1361283