Nike Men's Pro Hypercool Fitted Sleeveless Shirt Made of 93% polyester and 7% spandex plated jersey with 92% polyester and 8% spandex circular-knit mesh and a 100% polyester warp-knit jacquard back pa Moisture-wicking Dri-FIT Max fabric technology helps keep you cool and dry Sleeveless Flatlock seams help minimize chafing Swoosh design trademark at the upper left chest Fitted silhouette