Designed to help you regulate your core body temperature and prevent overcooling during intense physical activity in cold conditions. Our Ortles Hybrid TirolWool® Responsive Vest is the ideal extra insulation layer for skimo, ski touring, alpine climbing, ice climbing and more. TirolWool® Responsive is our proprietary lightweight, insulation material that combines innovative polyester fibres enhanced with thermo-reactive minerals and wool sourced from Tirolean sheep. Heat emitted by the body is absorbed and converted into infrared radiation, which is stored and reflected back to the body – keeping you warmer for longer. TirolWool® Responsive is water resistant, breathable and will still keep you warm when wet. Further features include: Durastretch inserts for ease of movement, high ergonomically-shaped front collar and front zip with full-length internal windproof flap.