UA Iso-Chill Run Men's 2-in-1 Shorts 1364858-001We 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. Lightweight, stretch woven outer fabric delivers superior comfort & durability Built in Iso Chill mesh compression shorts disperse body heat, making it feel cool to the touch 4 way stretch material moves better in every direction Material wicks sweat & dries really fast