NIKE Pro Combat Hypercool Compression Fitted Shirt, Volt Yellow, XL, 636155 309 8% spandex The Nike Pro Combat Hypercool Compression Speed Men's Shirt is our lightest, most breathable base layer to date Dri-FIT Max fabric pulls sweat fully off the skin to help you get drier faster. Mesh panels under arms, at sides and back for excellent ventilation. Flat seams move comfortably against your skin during motion. Ergonomic seams and stretch fabric give you plenty of room to move. Dri-FIT 92% polyester/8% spandex. Back panel: Dri-FIT 100% polyester.