Marmot Hydrogen Sleeping Bag

Priced: $261.71 - $369.00 Rated:   - 5 stars out of 5 by 11 reviews.
Marmot Hydrogen Sleeping Bag
Zoom In
Available Colors:
Marmot Hydrogen Sleeping Bag -
The Marmot Hydrogen 30-Degree Down Sleeping Bag provides a comfortable haven for sleep for an incredibly small amount of weight. By combining premium 850+ fill down with an ultra-packable Pertex Microlite shell, Marmot managed keep the Hydrogen's weight well below two pounds without sacrificing warmth or comfort.


  • Lightweight Pertex® Microlight fabric stands up to abrasion and won't let the down escape
  • Stretch tricot baffles allow the bag to be stuffed and unstuffed without tearing the baffle material
  • DWR finish on the fabric repels frost, dew, and condensation


  • Ultralight Pertex Microlight ripstop shell is highly breathable, water-resistant, and resists abrasion and wind like a champ


  • Nautilus 6-baffle hood wraps around your head and provides 3D protection against heat loss


  • Down-insulated draft collar and down-filled draft tube backing the snag-free zipper seal out cold air
  • Sewn baffles save weight ensure that the insulation stays in place so you don't suffer cold spots
  • Velcro free face muff is more comfortable, and cinches down to keep cool air from slipping in by your face
  • Ground-level side seams eliminate cold air leaks and allow the goose down insulation to loft fully
  • Lofty, premium 850-fill-power goose down offers superb warmth for minimal weight; it's meticulously cleaned and processed for hypoallergenic qualities
  • Nautilus 3D 6-baffle hood envelops your head in warmth; down gasket face muff allows hood to be cinched snug without digging into your face
  • Hood Muff is a warm down gasket around the face designed to keep heat in while keeping the drawcord away from your face
  • Premium 850-fill goose down packs down well, rebounds nicely after repeated compression, and features a high warmth-to-weight ratio
  • Down is treated to resist moisture to maintain warmth; treated down stays drier 10 times longer, maintains 150% more loft and dries 30% faster than untreated down
  • Down-filled full-length draft tube protects against areas where cold can creep in unexpectedly
  • 850+ fill goose down packs small and keeps you ultralight
  • Filled and finished in Santa Rosa, California

Weather and Wind:

  • EN comfort-rated at 40-degrees F for chilly summer conditions; lower-limit-rated at 30-degrees F for occasional use during cold shoulder-season trips
  • Ground-level seams help prevent heat from escaping upwards through seams


  • Zipper guards prevent zipper snags; locking zippers keep bag from opening if you toss and turn at night
  • Left zipper
  • Smaller and shorter zipper saves on weight


  • European Norm (EN) is an independent third-party temperature rating, allowing accurate comparisons across brands with other EN-rated bags
  • Received the Backpacker's Magazine Editor's Choice Gold Award for 2008
  • With a European Norm (EN) lower-limit rating of 29°F, the Hydrogen sleeping bag is suitable for 3-season use
  • Marmot Hydrogen Sleeping Bag comes with a stuff sack and a storage bag
  • Large trapezoidal foot box decreases constriction at the bottom of the bag
  • Trapezoidal footbox is wider in the toe area and narrower in the heels to match the shape of your feet
  • Stretch tricot baffles at foot and head regions extend the life and shape of bag and improve warmth retention
Rocky Mountain Trail

Marmot Hydrogen Sleeping Bag.
Hand-stuffed in California with water-resistant 850+ fill power goose down, the Hydrogen delivers enough warmth for ultra-light cool-weather climbs and backcountry excursions. Weighing in at a wispy one pound, the Hydrogen loves light and fast climbs and hikes. Filled and Finished in Rohnert Park, California | Certified 850+ Fill Power Goose Down | Down Defender to Improve Water-Resistance in Wet Conditions | EN Tested | Pertex© Micro light® Shell and Lining Fabric | Full baffle construction | Nautilus 6-Baffle Hood | Classic Trapezoidal Foot Box | Insulated Draft Tube | Stretch Tricot Baffles | Full Length Zipper | Zipper Garage | Hood Draw Cord | Velcro®-free Face Muff | Zipper Guards | Stuff and Storage Sack Included
The Marmot Hydrogen is a perfect Sleeping Bag for those warmer backcountry adventures or for lighter backpacking trips. The Hydrogen will keep you warm in up to 30 degree Fahrenheit weather with its 850 fill Power Goose Down and Insulated Draft Tube.

The Hydrogen sleeping bag from Marmot is a lightweight sleeping bag perfect for ultralight climbing, or backpacking in warmer weather.

Mountain Gear

The Hydrogen 30-degree, down-insulated sleeping bag from Marmot is ultra-light and remarkably compressible so it's perfect for minimalists or fast and light outdoor adventurers. Silky smooth and totally comfortable, it's just as right for casual outings as it is for your epics.


Weighing less than 2 lbs. and filled with quality 850-fill, water-resistant goose down, the Marmot Hydrogen Sleeping Bag delivers warmth for ultralight, cool-weather climbs and backcountry excursions.

Imported. Top 25 Category Product
View other top products in this category...
Want it cheaper? Set your own price.
Enter the price you want to pay and we'll email or text you if we find a store that will sell it for that amount:
Price: $
Your email:
Cell number: (optional, for text message)
Learn how offers work...
11 people have already set their own price.
Average Price History: Price History
Review RatingNumber of Reviews
Baffles:Stretch Tricot Baffles
Bag Shape:Mummy
Bag Weight:1lb 12oz
Compressed volume:Yes
Construction:Full Baffle
Country of Origin:USA
EN comfort (rating for women):30 degrees Fahrenheit
EN lower limit (rating for men):Backpacking
Fill:1 lb. 9 oz.
Fill Material:850+ Fill Power Goose Down
Fill weight:1 lb. 12 oz.
Fits up to (in.):Ripstop nylon
Foot Box:Trapezoid Foot Box
Hip girth (in.):Down
Hood:Nautilus 6-Baffle Hood, Hood Drawcord
Insulation:-1 degrees Celsius
Insulation Type:850+ Fill Goose Down
Length:Regular - 6 ft
Liner Material:100% Polyester Taffeta DWR 1.0 oz/yd
Lining:0.71 kilograms
Lining Material:20 Denier 100% Recycled Polyester Mini Ripstop DWR 1.0 oz/yd
Material:20 Denier 100% Nylon Mini Ripstop DWR 1.1 oz/yd
Shell:30 degrees Fahrenheit
Shell Material:100% Nylon Ripstop DWR 1.2 oz/yd
Shoulder Girth:Regular - 62 in
Shoulder girth (in.):Ripstop nylon
Sleeping bag shape:0.79 kilograms
Storage Sack Included:yes
Stuff sack size:Down
Stuff sack volume:Yes
Stuffed Size:12 x 6 in
Temperature Rating:30F / -1.1C
Temperature rating (C):39 degrees Fahrenheit
Temperature rating (F):30 degrees Fahrenheit
Water-resistant down:-1 degrees Celsius
Weight:39 degrees Fahrenheit
Weight - metric:30 degrees Fahrenheit
Zipper:Full Length Zipper, Zipper Garage
Zipper Length:Full
Zipper Side:Left
Compare specifications to related products.

Similar Products:

Marmot Hydrogen-RegMarmot Hydrogen-Reg$349.00

Subcategories of Sleeping Bags & Pads:

Related Categories:


Marmot Hydrogen Sleeping Bag Reviews:


Excellent 3-Season Bag

The Marmot Hydrogen is a great bag to own. For a 800+ fill bag, it's reasonably priced and very warm and lightweight. I've had a lot of success using this bag below 30 degrees by combining it with a thermolite sleeping bag liner and/or down clothing as well. If you pack accordingly, I think you can safely trust this bag close to 10 degrees. I've personally slept with this bag in Joshua Tree's deserts in January and also in Northern Michigan Spring through late Fall with great comfort. Treat it with care and you can expect nearly a lifetime of service from a bag of this quality.

My only gripe is that I'm not a fan of the stuff sack it came issued with. It is difficult to pack and does not have any compression straps to condense the bag to a smaller volume. I've since gone on to replace it with a waterproof compression sack and I really recommend this as an accessory to the bag. You'll cut volume, the weight is negligible, and you'll add insurance to your bag by waterproofing it. You'll come to appreciate this if you ever get caught up in a storm or fall into water with your pack (as I have) or discover that your kayak's bulkheads weren't nearly as dry as you thought they were. Well worth the investment and has greatly improved my experience with this sleeping bag.
Jason the Argonaut at Mountain Gear on 06/06/2010

I was looking for a lighter weight summer bag that would still work on the cold nights in the High Sierras. I just came back from a 5 day trip in Yosemite were we were camping around 9000' most nights. Temperatures ranged from 40-60 degrees at night and this bag worked well. If the temperatures dropped below 40 degrees I would have needed to put on long underwear and more layers but that is to be expected but I think I would be pretty cold at 30 degrees. The zipper and bag are fairly sturdy and the lining is very comfortable against the skin.
I'm 5'10, 165lbs and female and the regular bag fit very comfortably. I'm happy with the bag and will keep it.

dsup514661 at on 06/12/2013

I love this bag! It is incredibly light and packs down to a very small size. I decided to buy this after seeing it stuffed into its stuff sack in person and I couldn't believe the size of it. I only like to use a 55L backpack during the summer to keep me from getting sweaty and this sleeping bag fits perfect. If you don't mind the sticker get this bag! I had trouble deciding with this bag over a western mountaineering but I have had great experiences with Marmot and trust the brand.

Ian Pickard at on 05/18/2010

A good fit for drier conditions.

This is a good 3 season bag: light weight, compact and a snug fit. I have used it down to 16 degrees where a bag liner and a tight tent allowed me to stay sufficiently warm but not comfortable; I tend to sleep warm. At this point, I wish I had purchased the Helium (20 degree) bag for winter use in the Washington Cascades. For 30-degree or warmer weather, I would now opt for a lightweight compact synthetic bag.
Never in a hurry to get back to the car. at Mountain Gear on 09/09/2009

And today's magic trick will be....

The Hydrogen is certainly like a magic trick when you're pulling a 30 degree bag out of a football sized stuff sack! For people who enjoy kayak touring, this bag fits great into any hatch. I've also used it on numerous backpacking trips and been very pleased with how light it is and the amount of space it DOESN'T take up. I'm generally a cold sleeper, but the half zipper and snug fit keep me nice and toasty.
Alicia at Mountain Gear on 09/09/2009

I get cold easily, and I've never had a very nice bag, so I've missed out on a lot of camping! First night I used this bag it was 35 out and I was warm and cozy in this bag. It is very light and packs down nicely.

wss3354024 at on 03/22/2011

One of the best bags I've ever used (and I have 10+). Small, VERY compressible, warm. Perfect for normal sized people. If you're a bigger guy, it's a little on the small size, but still okay since you're backpacking. If you're car camping, take something from Cabelas.

zolotoi at on 02/14/2013

I slept in this bag in 5 deg Celsius (about 40f) and with windchill colder. This bag is everything people say it is - fantastic - very warm and comfortable (and feels snug but not tight (I am 5ft 7 inch). Don't hesitate.

jonebee592151685 at on 02/06/2012

This is a fantastic bag, the 850 fill down keeps you warm, but is very lightweight. I'm 5'9.5'' 165lbs and the reg works out really well. There is enough room to sleep on your side, but it is nice and snug.

Sunn Kim at on 05/17/2012

Great bag, as light as they come without spending half a grand. True to temperature rating. Packs down small, very small with an aftermarket compression sack. What more could you want, really? Marmot makes great stuff.

John Baer at on 07/08/2013