SCARPA‰۪s Inverno is a high-altitude cold-weather workhorse. We all have friends who snow-make in them, others who‰۪ve summited Denali in them, and still more who pull them out any time it‰۪s frigid. Invernos are produced in SCARPA's Italian factory with Pebax, so they won‰۪t stiffen in the cold. They are designed with just enough rocker to help you walk and the high-altitude liner insulates down to Alaska temps. Probably the most widely used plastic double-boot in the world today. A great value and Himalaya-worthy performance.