Call for availability! The Swix Membrane 4.0 Glove is a System 4 cold weather glove with 3 layer Windblock membrane upper for waterproof and breathability. Chamude palm with reinforced Amara patch at thumb and palm side for durable wear and tear. Outseam sewn fingers for comfort. Airprene cuff. Insulation: 3M Thinsulate, Lining 100% brushed poly.