UA Tech™ is our original go-to training gear: loose, light, and it keeps you cool. It's everything you need. Smooth, lightweight, fast-drying fabric for superior performance. Material wicks sweat & dries really fast. Dropped armholes for extra mobility & range of motion. New, streamlined fit & shaped hem. Fitted: Streamlined fit that’s not too tight or too loose. 100% Polyester.