The Rab Men’s Positron Pro Hoody is a heavyweight down jacket designed for winter mountaineering, high-altitude ice climbs, and expeditions. It features the high-loft, 800-fill down insulation for extreme loft and surprising packability for a puffy this big. Rab finished the down insulation for hydrophobic moisture protection that keeps the down lofty in alpine climates. A windproof, downproof, and highly water-resistant Pertex Quantum Pro shell blocks breezes, snow, and spindrift. Articulated sleeves ensure full mobility up and down the mountain, and a regular fit lets you layer up comfortably.