UNIT Pro Flex Performance Tank Combining ride-friendly tech with familiar T-shirt comfort this Performance Tank is designed to elevate athletes to their peak fitness potential while still ensuring comfort and endurance with each wear. Regular-Fit Performance Tank made with Polyester/Spandex Blend As far as everyday-wear Tech Tees go this one is about as close to perfect as it gets. There's plenty of give afforded by the 4-way stretch element of this regular fit performance tee to maintain all-day comfort, and it's constructed from lightweight Polyester/Spandex Quick-Dry jersey fabric to wick away perspiration and prevent bacteria from generating odours. Added Safety Features A reflective transfer print is positioned on the Chest, with the UPF50+ protection integrated into the fabric to safeguard your skin from the sun's harmful rays.