For breathable warmth and wind resistance on cold days in the alpine, the Coefficient Storm Hoody is the ideal do-it-all, cool-weather stretch jacket. This hoody is built with a grid back that provides additional warmth and breathability, and a wind and water-resistant coating adds extra warmth and durability. A full zip design with a single chest pocket and two hand pockets, the Coefficient Storm can also pack into its front hand pocket when the sun hits.