The North Face Plasma Thermal Jacket: Lightweight and to the point The North Face PlasmaThermal jacket was designed for the frost bitten ice axe driving vertical ascents of mountaineering. Waterproof, breathable, and fully seamed sealed the Plasma Thermal is comprised of exceptionally lightweight PrimaLoft 100g insulation and seam sealed HyVent Alpha 2L 100% nylon faille weave fabric creating an exceptionally warm and durable jacket impervious to the elements. Its performance fit provides agility and dexterity in an atmosphere that cannot afford restriction. Set yourself in motion and summit in The North Face Plasma Thermal Jacket.