Our lightest synthetic baselayer keeps you dry and cool in warm conditions; with 15-UPF sun protection. Fast drying, highly breathable, provides 15-UPF sun protection, and can be worn on its own or under layers in cooler temperatures. Neck is slightly scooped with pliable self-fabric binding. Set-in sleeves reduce chafe beneath pack straps. Cut long enough to tuck in. Machine-wash cold, tumble dry at low temperature. 3.4-oz 100% recycled polyester, with 15-UPF sun protection and Gladiodor® odor control for the garment. 102 g (3.6 oz) Made in Colombia.