NIKE Pro Hypercool Sleeveless Compression T-Shirt Sleeveless - for excellent range of motion when hitting the gym or sprinting. Mesh Panels - at side-seams with contrast stitching, for breathability and comfort when running. Mesh Panels - at center back for additional breathability in high heat zones. Nike Pro Fabric - Helps you stay dry and comfortable by wicking sweat away from skin to the fabric's surface, where it quickly evaporates.