Polyester 92%, Spandex 8% – Smooth and Ultra-Soft Fabric that provides extreme comfort with very little weight without restriction – Machine Washable. Quick and Dry Transport System – Wicks Sweat away from the body, keeping you cooler and drier. Workout or Compete for all weather sports and activities – Cool in Summer and heat retention in winter. Compression fit bolsters muscle support and increases circulation. UPF 30 – Protects your skin from the sun’s harmful rays.