SWEAT-WICKING COMFORT. The Nike Pro Top helps keep you cool and dry in lightweight fabric made from at least 50% recycled polyester. Built-In Comfort: lightweight, breathable fabric with Dri-FIT technology moves sweat from your skin for quicker evaporation to help you stay cool, dry and comfortable. Flexible Coverage: redesigned seams at the sleeves let you move your arms naturally as you stretch and lift. Hem vents help you move without restrictions, while a longer back has you covered through bends and sprints. Standard fit for a relaxed, easy feel.