Whats the secret behind the Trek Tops super positive outdoor attitude? Great question. The answer revolves around her rigorous resume of quick-dry fabric, boasting 50 UPF protection, plus dandy overlapped sides and shaped shirttail hem.Supernaturally lightweight, quick-drying, and UPF-shielding, our Stellar Knit is in a universe of its own. Each piece is made from 4 plastic bottles, serves as the perfect swim cover, standalone statement, or pair with our shorts for a ready for anything light and breathable kit.