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Marmot Helium Sleeping Bag: 15 Degree Down

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4 5

Fantasticaly Warm Sleeping Bag

  • Familiarity: I've used it several times

I've only had the chance to use this a couple of outings and so far I have only good things to say about it. It's roomy! My previous mummy bag felt very constricting but this Marmot Helium bag has ample shoulder room. It's fantastic both on the ground (it has enough room and is tight enough that rolling around at night doesn't put your face in the hood...), and it's even better in my hammock. The higher degree fill allows it to be a lighter blanket over my hammock on warm nights, and the extra roominess of the bag really lets it "tuck me in" on cold nights in the trees.

The only complaint I would have with this bag is it doesn't have the traditional baffles around your neck that I liked to keep out the extra airflow during colder nights, but so far that hasn't been an issue. Happy Camping!

5 5

Stays Lofty 10-Times Longer

  • Familiarity: I've put it through the wringer

The Marmot Helium weighs just over two pounds, packs down small, has a silky smooth shell fabric, and all of that is great for backpacking, but my favorite thing about this bag is the Down Defender treatment. The treatment makes the down water-resistant, and that means it will maintain its loft for 10-times longer than untreated down. Remember that loft is practically synonymous with warmth, so this is a big deal, especially on multi-day trips.

Stays Lofty 10-Times Longer
2 5

Too short!

  • Gender: Male
  • Familiarity: I've used it several times

Very nice bag, but too darned short! I'm 5'9" and the regular size should go to 6'. It's a squeeze for me to get into this bag completely zipped up. I feel like my feet are scrunched in the bottom or head is scrunched in the hood. Marmot must have trimmed some length to loose some weight. Check the length!

5 5

Solid all around bag

  • Familiarity: I've used it several times

I bought a previous season's model on clearance and have used it on a number of warm and cold weather backpacking trips. The weight and stuff size are great, but for the full retail price you could do better. The stuff sack that came with the bag is a tad small (the bag actually pushes open the draw string), but I've found it fits perfectly in a 10L dry bag.

With an insulated sleeping pad and a down jacket this bag kept me warm at 0-10 degrees, but I don't get too hot on warm summer nights either. I would say the temp rating is accurate/conservative.

The only complaint I have is that the zipper is cheap and hard to use for a bag in this price range. It doesn't catch on the bag material, but it doesn't zip as well as you'd expect it to.

Bottom line: If you can get this bag on sale, buy it and it won't disappoint. But for $400, consider looking elsewhere (zpacks, featheredfriends, etc)