The Astroman Sun Shirt is the best-selling lightweight, stretchy, and ultra durable fabric packed with the highest rating of UPF 50 sun protection. Named after the legendary climb in Yosemite Valley, the Astroman was built for exposed and rugged climbs, but works equally as well for hiking, paddling, backpacking, bushwhacking, or any other activity when you're headed out in the blazing sun. The hoodie version might be our favorite for protecting ears and back of neck, while controlling windblown hair and of course - fitting easily underneath a helmet.Features Breathable Lightweight Movement-Mirroring Stretch Wicking Quick Drying UPF 50+ 3-panel Hood 14 1/2" Front Zipper Packable Security Zip Chest Pocket with Interior Loop Low-Pro Binding™ Cuffs with Thumb Loops Specs FABRIC: bluesign® approved 84% nylon, 16% spandex WEIGHT: 5.7 oz/160 g