The Astroman Sun Hoodie is Outdoor Research's best-selling lightweight, stretchy, and durable fabric packed with UPF sun protection. Named after the legendary route in Yosemite Valley, the Astroman was built for exposed and rugged climbs, but works equally as well for hiking, paddling, backpacking, or any other activity when you're headed out in the blazing sun. The hoodie version is designed for protecting your ears and the back of your neck, while controlling windblown hair and of course - fitting easily underneath a helmet.