There’s no need to tie this layer around your waist once cold mornings turn into warm afternoons. (But if it does end up in your pack, it’s so lightweight you’ll barely notice it.) When wind gusts dropped temps up on a mesa in Arizona’s Coconino National Forest, we stayed cozy thanks to heat retained by the lightweight polyester fabric’s hollow-core fibers. Later, during a half-mile sprint up 500 feet of vert in 50°F weather, the loose cut circulated air and the shirt’s material dried in less than 10 minutes after we finished our 9-mile run. Bonus: Supersoft cuffs with thumb holes stayed put while we ran.
m’s XS-XL, w’s XS-XL