The Nano-Air® Jacket is a breakthrough in active insulation for high-output, stop-and-go alpine missions in the cold. Its stretchy and highly breathable fabric package manages variable temperatures to keep you comfortable throughout a range of conditions, by integrating the qualities of fleece, soft shell and puffy by combining our warm-when-wet FullRange® insulation with a plain-weave liner and a lightweight, weather-shedding shell. All of which means you can put it on and leave it on. The incredibly soft, supple feel and full mechanical stretch allow for a close, femininely sculpted fit over baselayers and an uninhibited range of motion. At chilly belays or in frigid conditions, pull on a lightweight shell and the Nano-Air’s thermal properties skyrocket. The left-chest pocket and two above-harness handwarmer pockets all close with trim, low-bulk zippers. The center-front zipper has a storm flap and zipper garage, a dual-adjustable drawcord hem seals in warmth and the Variable Conditions Cuffs have sleek, low-bulk, stretch-knit insets that allow you to easily push up your sleeves. The jacket has a DWR (durable water repellent) finish.