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The Marmot Hydrogen is a three-season mummy sleeping bag filled with 800-fill down and built with lightweight nylon inside and out. It is made for backpackers and mountaineers who count grams and want a warm bag that packs small. Against synthetic rivals it compresses far smaller and breathes better, but it needs to stay dry and costs more than a comparable synthetic bag. Owners rate it highly for warmth-to-weight and packability.
In stock
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Lowest price we've seen: $429.00 on Nov 13 at Marmot. Tracked across 1 store since Nov 13.
Rated 4.5 out of 5 from 19 ratings, owners praise the Hydrogen for its warmth-to-weight ratio and how small it packs. Complaints center on the snug mummy cut and the care down requires.
The Marmot Hydrogen is a mummy-shaped, 3-season down sleeping bag for unisex use.