Marmot Hydrogen 21-22

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More Information
Insulation Down
Comfort temperature 0° / 10°
Weight 500 - 750g

Quick overview

The Marmot Hydrogen Sleeping Bag delivers comfort for cool-weather adventures while staying light in your pack. With a Pertex® Quantum shell, its lofty 800-fill-power-down insulation and water-resistant Down Defender treatment will keep you warm and dry. Give your feet a rest in the roomy wraparound footbox. Smooth, curved baffles help keep the fill in place, while the nautilus hood limits heat loss. If the temps rise, use the fold-down secondary zipper to air it out.


Mummy sleeping bag
A mummy-shaped sleeping bag offers several advantages. The close-fitting shape means there is less room for air in the sleeping bag. You'll have the air that's in there up to temperature faster, making the sleeping bag warmer than a rectangular model. Also, most mummy sleeping bags come with a hood and a collar just above the shoulders that you can tighten. These features keep the heat trapped inside the sleeping bag and protect your head and neck, where you lose the most heat. The tapered shape reduces weight and volume in your backpack, bike pannier or car trunk.

Down insulation has an excellent insulation-to-weight ratio. It is very compressible, so a bulky, warm sleeping bag, can still be reduced to a small, manageable package. Also, the weight of a down-filled sleeping bag is much lower than that of a synthetic-filled sleeping bag with a similar temperature range. The temperature range of down is greater than synthetic materials such as polyester. This means that a warm sleeping bag can be used comfortably even at higher temperatures. Finally, down has a much longer lifespan.


  • Insulation: 800+ Fill Power RDS Goose Down Down Defender
  • Insulation Weight: 320 g
  • Insulation Type: Down
  • Recommended Use Temperature: -1°C
  • Temperature Rating Comfort: 2°C
  • Temperature Rating Limit: -3°C
  • Temperature Rating Extreme: -20°C
  • Zipper Option: Left
  • Main Material: Pertex Quantum© 100% Recycle Nylon Plain Weave, Pertex Quantum© 100% Recycled Nylon
  • Plain Weave
  • Lining Material: 20d 100% Recycled Nylon, Cire Back
  • Size on Shoulder: 155 cm
  • Size on Hip: 142 cm
  • Size on Foot: 113 cm
  • Pack Size: 30 cm x 15 cm
  • Weight: 735 g