The Marmot Sawtooth MemBrain Sleeping Bag is one of the most versatile down bags on the market. The versatility stems from its waterproof/breathable two-layer MemBrain® fabric which protects the 600+ fill goose down from moisture. Tested to 15F degrees, this is a great bag for alpine excursions where you're hiking through snow and are often battling wetness and condensation. The down insulation makes it lightweight and packable so it effortlessly assimilates itself into your pack. The down-filled collar and draft tube will eliminate cold spots to ensure a toasty warm night sleep. If only geese had this MemBrain technology, they might not have to fly south for the winter.
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