Nike Men's 5IN Phenom 2-in-1 Running Short 82% Polyester/18% Nylon Imported Machine Washable This lightweight and breathable running short is designed with a built in compression liner. Zipper pocket on back to hold keys, ipod, etc. Style: Phenom 2 in 1 Short - 5" inseam Vented sides for added breathability Nike's Dri-FIT technology wicks moisture away from the skin and quickly evaporates it to the surface. You're sure to stay cool and comfortable in this breathable running short. Fabric: 86% Polyester/14% Spandex