The Salewa Men's Sesvenna PTC Alpha Jacket is an athletic insulation made to be a midlayer for ski touring and mountaineering. Polartec's air permeable Alpha insulation starts to breathe the moment you put the jacket on, unlike standard breathable garments that only breathe until after you start sweating. Polartec Alpha also manages moisture by drying quickly, and the Durastretch shell sheds moisture on the outside to keep you comfy under snowfall. The shell also has a four-way stretch to move with you from uphill to down. The jacket stows inside the compression pouch of easier packing in small ski packs.