The outer layer, made of featherlight Pertex Quantum Air, is windproof and breathable, preventing sweat buildup. The inner layer of Polartec Alpha Direct active insulation provides warmth while wicking moisture and drying quickly, allowing for instant adaptation between hot and cold. Its 3D athletic fit ensures unrestricted movement for running and hiking. Large capacity pockets free up your hands, while windproof cuffs can be folded down to serve as warm mittens. An adjustable hem seals out drafts. The jacket is self-packable into a waist pouch and features reflective logos for nighttime safety. From urban commutes to alpine camping, this single piece handles a ten-degree temperature variance, keeping your core temperature protected all day with minimal weight.