UA RUSH™ is infrared technology that reflects your body's energy to help you work harder & recover faster Super-soft ColdGear® fabric is breathable & stretches for superior mobility but is still incredibly warm ColdGear® mesh back & side panels provide breathability where you need it without sacrificing warmth Strategic seam placement to eliminate pressure points & chafing Mock neck construction for added coverage - Style #: 1366059 Powered by Celliant Body: 84% Polyester/16% Elastane Mesh: 82% Polyester/18% Elastane Imported - Wash garment inside out 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