ODLO is the leader in innovative layering solutions and the Blaze ZW Ceramiwarm ½-zip mid-layer is a perfect example of some of our most advanced fabrications. Our Ceramiwarm active warming technology provides incredible thermoregulation by generating up to 3˚C more heat compared to other fabrics without adding weight and without overheating. When the temperature starts to plummet, zip it up for maximum heat retention. The Blaze ZW also features a chest zip pocket to keep valuables secure. Thumb holes are a fantastic way to keep your sleeves straight when pulling an outer layer over it as well as adding hand warmth and sealing in heat.