BEST FOR: Chilly or windy trail running and mountain biking.
THE TEST: “Nano” refers to the weight—less than five ounces. As for the “wick,” Marmot took DriClime, its popular liner fabric, which mechanically pulls moisture away from the skin, and knit it into a superfine mesh in the jacket’s body. When the sweat started flowing on rides and trail runs, the shell didn’t stick to testers like plastic wrap; it remained soft and dry next to the skin. “It looks flimsy,” said one, “but it came out unscathed after I crashed into a blackberry bramble.”
THE VERDICT: The most comfortable sub-five-ounce shell we’ve tested. 4.5 oz