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For dynamic movement in mountain environments the Proton Hoody provides lightweight warmth. Fortius Air 20 face fabric combines with Coreloft Compact 80 insulation to deliver exceptional breathability durability weather resistance and compressible warmth. Designed to work with the body this air permeable hoody helps to regulate temperature adapting to static and dynamic movement. With a trim fit for easy layering and athletic performance the articulated cut and gusseted underarms allow full mobility. The No Slip Zip and insulated helmet compatible hood ensure heat stays locked in. Tackling rock ice and snow keep all your focus on the route and let the Proton Hoody take care of the rest.