Full Length Locking YKK Two Way Zipper with Zip-Guard Slider
Down Defender to Improve Water-Resistance in Wet Conditions
Nautilus Multi-Baffle Hood
Internal Stash Pocket
Snagless Insulated Draft Tube
Two Way Zipper Sliders
Hood Draw Cord
Stretch Tricot Baffles
Two Hang Loops
Stuff and Storage Sack Included
The Hydrogen 30° Sleeping Bag - Long delivers enough warmth for cool-weather adventures and backcountry excursions, yet still keeps base weight at a minimum on light and fast climbs. Featuring Pertex® Microlight on the exterior, its lofty 800-fill-power-down insulation and water-resistant Down Defender treatment will keep you warm and dry. After an epic day on the mountain, give your feet a rest in the roomy wrap-around footbox. Smooth, curved baffles help keep the fill in place, while the nautilus multi-baffle hood with a drawcord, snagless insulated draft tube, and full-length two-way zipper with a zip-guard slider limit heat loss. If the interior gets too warm, use the fold-down secondary zipper to get some air. Tuck small items into the internal stash pocket.
Bag Temperature Fahrenheit:30°F
Bag Temperature Celcius:-1°C
Tested Comfort:33.6°F / 0.9°C
Product Weight:1lbs 11oz (770g)
Main Fabric:Pertex 20d 100% Nylon R/S 1.03oz/yd
Lining Fabric:30d 100% Nylon DWR 1.09 oz/yd
Insulation Material:800+ Fill Power Goose Down
Shoulder Girth:63in (160cm)
Hip Girth:58in (147cm)
Footbox Size:41in (117cm)
Includes Stuff Sack:Yes
Stuff Sack Size:6 x 12 in, 15.2 x 30.5 cm
Includes Storage Sack:No
Includes Compression Stuff Sack:No
Compressed Volume:299.0ci » 4.9 liters
Rated 5 out of
Marmot Hydrogen 30 in the Pacific NorthwestIn my opinion, Marmot makes the best bag for the money. I have researched and bought other brands and now I have the hydrogen Long. The construction quality, the hood, the zipper, the footbox, the baffles and loft, are all A+. And it seems to me while other manufacturers squeeze to the lower EN limit, Marmot adds a little EXTRA down. For example this Hydrogen bag which they list as a 30 degree lower limit bag actually has an EN rating of 24. You can get a slightly lighter weight 30 degree bag with 850 down (instead of 800+)and pay twice as much or more, and I'm sure they are very good, but I'm convinced that Marmot is the most bang for the buck. (also, just to say, the EN # isn't everything, but it's the only way to COMPARE the warmth of similar bags)
Date published: 2021-06-25
Rated 5 out of
Fantastic 3-season bagMore like a 20 degree bag, this bag is plenty warm. I upgraded from a long 20 degree Marmot Trestles Elite synthetic bag, which is a decent bag for the price, but much heavier and bulkier than this Hydrogen 30, and both bags seem to provide about the same warmth.
This long Hydrogen 30 has plenty of room for me at 6'4" and 160 lbs. I don't feel constricted, just very cozy/warm. This is my first down bag and it feels quite luxurious compared to the 5 year old synthetic bag it has replaced. The difference in loft is remarkable, as my old synthetic bag has almost none by comparison.
It packs down scary small, and weighs hardly anything. The zippers are solid and smooth, and the craftsmanship had no issues. Having this bag makes me want to get out there and hike/camp. Besides the backpacking I've done with it, I've actually spent some time using it at home in the bedroom just for kicks on colder days. Expensive, but worth it if it suits your needs.
Date published: 2021-09-01
Rated 5 out of
Ryan VB from
Extremely light and warmThe. Perfect. Summer bag. I totally forget I’m carrying a sleeping bag, when I use it I’m plenty warm throughout the night and I get to look cool rocking Marmot gear. I’m one happy camper. I spend 200 plus days a year outside and have been very pleased with my Marmot gear.