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The Mountain Hardwear Phantom 0F Down Sleeping Bag packs down small and light while offering big-time warmth for camping in winter conditions. Clocking in just over two-and-a-half pounds, the ultralight mummy bag is designed to fit close to our body to minimize heat loss, with a DWR treatment to ensure the down stays lofty as condensation builds in our tent or portaledge. The contoured footbox gives our feet room to move and ensures our feet stay warm throughout the night, and the draft collar keeps our core warm so we can maximize our rest before the summit push.