Temperature balance built for the trails - the Zephyrunner Wind Shell is an ultralight, packable essential that helps you effortlessly navigate changing conditions by balancing durability, breathability, and coverage for year-round adventures. The Zephyrunner strikes a perfect balance of wind-breaking breathability with a CFM rating of 16 engineered specifically for running + high-activity output activity. Featuring two (2) zip hand pockets and a zip chest pocket stash small essentials close at hand.