What Our Gearhead® Experts Are Saying:"I brought the Glaceon Pro on a summit push in the Wasatch and it crushed—warmth without bulk, and the Pertex Pro shell actually shed snow and wind better than I expected. Great for alpine missions where conditions shift fast."When the mountains turn cold and winter winds howl, the Glaceon Pro Jacket becomes our portable shelter. Built by Rab for rugged alpine environments, this cold-weather specialist pairs warmth, protection, and packability in a design made for exposed belays, high ridgelines, and fast-moving winter missions. Inside, 700-fill-power recycled down provides lightweight insulation with serious loft, enhanced by a Nikwax hydrophobic treatment that resists moisture from snowfall or sweat. The outer shell is made from durable Pertex® Quantum Pro with a fluorocarbon-free DWR finish, protecting against wind and light precipitation. Add in a helmet-compatible, down-filled hood, a belay-ready 2-way zipper, and low-profile pocketing, and the Glaceon Pro delivers everything we need to stay warm and focused when the mercury drops.