NIKE Pro Hypercool Short Sleeve T-Shirt Mesh panels - for breathability and comfort for when you are running, exercising or in hig Rib crew-neck - with contrast trim for durability and a comfortable fit at all times. Flat-seams - designed to reduce irritation, so your mind isn't taken off your training. Nike Pro Fabric - helps you stay dry and comfortable by wicking sweat away from skin to th Spandex - in the fabric adds stretch for range of motion for when you are picking up your