Your hiking, biking, anything outdoors staple An outdoor adventure essential, our Alpine Start Sun Tee is made from moisture-wicking fabric with UPF 40+ sun protection to keep you cool, comfortable and covered when you're headed outside. Features UPF 40+ fabric shields you from harmful UV rays Moisture wicking fabric keeps you cool and dry when the sun is out in force Anti-microbial fabric provides anti-odor protection to help keep your clothes fresh Anti-chaffing flat seam design Made for comfortable use under a backpack with off-shoulder seams Materials 88% Poly, 10% Spandex, UPF 40+ Tech Specs - Size M Center Back Length: 25.25 in / 64.14 cm Sleeve Length: 14.5 in / 36.83 cm Weight: 4.8 oz / 136.1 g