UA RUSH™ is infrared technology that reflects your body's energy to help you work harder & recover faster Durable tricot fabric with a brushed interior for soft comfort & warmth Material wicks sweat & dries really fast Strategic mesh panels for added breathability where you need it Ribbed waistband with external bungee drawcord adjust Secure, zip hand pockets - Style #: 1366172 Inseam: 30.5" Powered by Celliant Body: 72% Polyester/28% Elastarell Mesh: 82% Polyester/18% Elastane - Tapered leg fit with ribbed cuffs Machine wash cold with like colors Use only non-chlorine bleach when needed Tumble dry low Do not iron Do not use softeners Do not dry clean