Mountain Hardwear Phantom GORE-TEX Sleeping Bag: 0F Down

What Our Gearhead® Experts Are Saying: "I trust this bag for serious cold missions. The GORE Windstopper shell blocks spindrift and tent condensation, and the 800-fill down lofts big while still packing down reasonably small. The draft collar and oversized face gasket make a noticeable difference on sub-zero nights. It’s warm, protective, and built for real alpine conditions."When we’re pushing into the high alpine in deep winter, sleep becomes survival. The Phantom GORE-TEX Sleeping Bag: 0F Down from Mountain Hardwear is built for those frigid nights when wind rattles the tent and frost creeps across the ridgeline. Designed for backpacking, climbing, and ski mountaineering, it delivers expedition-level warmth without unnecessary bulk. A GORE Windstopper 2-layer shell blocks biting wind and repels moisture while allowing vapor to escape, keeping the down performing in severe conditions. Inside, 800-fill RDS goose down provides exceptional loft and compressibility for an efficient warmth-to-weight ratio. Vertical side wall baffles maximize loft retention, while a shaped draft collar and oversized down-filled face gasket seal in heat. The expedition mummy cut offers room to stash boots or layers in freezing temperatures, and the contoured footbox supports a natural sleeping position for better warmth. Built for serious cold, this is the bag we rely on for hut trips, alpine traverses, and deep-winter objectives.