Those who spend the most time outside in the sun, from climbers to fly fishing guides, know that skin protection is no joke. Featuring UPF 50+ sun protection and 89% polyester, this lightweight layer is both fast-drying and sun-blocking. Spyder's lightweight, stretch knit EXO THERMO Graphene technology distributes body temperature throughout the hoodie differently than typical materials; eliminating hot spots and avoiding overheating, so you don't have to sacrifice sun protection for comfort. Flatlock seams at the hood and sleeves eliminate potential for seams to rub against your skin when you're out there moving the most.