Beat the desert heat with the Chain Reaction tops named after the classic 5.12c ar??te at Smith Rock. Each piece packs in UPF 50+ sun protection ActiveFresh odor control technology send-enhancing stretch as well as a wicking and quick drying performance so you'll dry off just in time for the next go.. . 86% polyester 14% spandex. . ActiveFresh Odor Control. Wicking. Quick Drying. Breathable. Movement-Mirroring Stretch. UPF 50+. . Crossover Back Detail with Option. to Wear Open or Tied. Contrast Color at Neck & Bartacks at Chest Pocket. Bonded Detail on Small Pocket in Chest Pocket. Shipped with Tied Back