Built for bone-chilling temperatures Mountain Hardwear's Phantom Belay Down insurance fleet has us covered from Park City to Patagonia. It is filled with 800 density goose down providing excellent warmth and superior compactness for our cold weather climbs and mountaineering missions. It's also built for performance and features pockets suitable for seat belts, and a helmet compatible hood so we can keep warm while belaying or spending the night near a snowy peak.