Every serious runner needs a super-breathable shirt like the Under Armour Men’s Speed Stride Short Sleeve T-Shirt that is light and will wick sweat to keep you cool all run long. The shirt is made of 100% polyester and has a streamlined fit. The soft, ultra-lightweight fabric delivers superior breathability and incredible comfort. The material wicks sweat and dries really fast. The shirt has a dropped, shaped hem for enhanced coverage. The shirt also has reflective details for low-light runs. The shirt is machine washable.