The 1. 8 ounce Outdoor Research Radar Pocket Cap packs small enough to put in your pocket and protects your head from the sun with its UPF 50+ rated sun protection. Outdoor Research also included water-resistant and quick-drying technology in the headband to increase comfort and moisture management on the trail. Grab the Radar Pocket Cap to eliminate the chance of a sun-burned head on your next hike.