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  • Marmot - Helium Sleeping Bag: 15 Degree Down - Cobalt Blue/Blue Night
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  • Marmot - Helium Sleeping Bag: 15 Degree Down - Cobalt Blue/Blue Night

Marmot Helium Sleeping Bag: 15 Degree Down

sale $335.16 $418.9520% Off

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    • Cobalt Blue/Blue Night

    4 Reviews


    So light you'll forget you're asleep.

    Lighter than an imaginary cloud (and far warmer), Marmot's Helium 15-Degree Down Sleeping Bag is the perfect bag for long, chilly trips when added ounces can mean serious slowdowns. The Helium is part of Marmot's Ultralight series, which isn't quite as airy as the barely-there Ion, but it's a lot more affordable and still a killer three-season bag for backpacking, camping, and alpine missions. Pertex Microlight and nylon ripstop fabrics keep the superlight 800-fill goose down from escaping, and Marmot's Smooth-Curved baffle construction prevents the insulation from shifting around, so you're not fighting cold spots as you drift off to sleep. The Helium also sports an anatomically designed footbox and drawcord hood to keep your extremities toasty, and it uses a dual-zipper construction to let you fold down the top of the bag to sit up and increase ventilation when the night is a little warmer than expected.

    • 15 degree temperature rating
    • 800-fill down insulation
    • Pertex Microlight and nylon ripstop fabrics
    • DWR treatment
    • Anatomically designed wrap-around footbox
    • Drawcord hood
    • Dual zippers
    • Item #MAR00TJ

    Tech Specs

    [face fabric] Pertex Microlight (20D nylon ripstop), DWR treatment, [lining] 30D nylon, DWR treatment
    800-fill down
    full-length left, short right
    Bag Length
    [regular] 6 ft, [long] 6 ft 6 in
    15 F
    Claimed Weight
    [regular] 2 lb 1 oz, [long] 2 lb 4.5 oz
    Recommended Use
    camping, backpacking
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

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    Best bag ever!

    • Familiarity: I've used it once or twice and have initial impressions

    My husband, 10 year old son, and I got into backpacking 5 years ago. We finally decided to get our pack weight down to a more manageable level. We discovered that our old sleeping bags were near 4-4 1/2 lbs. We were suffering so on the long hikes. We researched bags and lo and behold we found the Marmot Xenon for women and the Helium for men. Mine 2.5 lbs, his 2.1. We went to Yosemite over Labor Day. The nights were quite chilly. Low 40's. The new bags were super warm. Only needed underwear and a base layer inside. Cozy cozy. Not only did we have lighter packs on our trip but toasty warm nights! We both bought the regular length. I am 5'6" and my husband 5'9" with slight builds. We fit perfect in each. Well worth the expense! Thank you Marmot!

    light and lofty

      so happy with this bag! packs down small, then fills out very nice when open. hooded area works great as a pillow if you stuff some xtra layers underneath it. excellent customer service from backcountry.com throughout my ordering process.


      • Familiarity: I've used it several times

      I have used this from 17-35 degrees without a pad and it is amazing! I'm always warm, and comfortable. The down quality is great. It regains its loft quickly after being in the stuff sack. It is super light and I love the venting, and cinching capability to increase or decrease warmth.

      One for the long haul

      • Familiarity: I've put it through the wringer

      This is my second Marmot Helium bag. the first served me for almost 20 years...in fact, I still use it in the summer. It has lost some loft and warmth from a couple goes through the washing machine.

      The new one I have had for a couple seasons and it's just a great spot to be when it gets chilly. I've used it down to about 20 degrees on a October trip to the Sierra. Super compressible and light, but still plenty roomy so I can pull my knees up (i'm 6' even and sleep on my side). I am very careful with this bag: it doesn't stay stuffed any longer than necessary.

      Looking forward to many years of service from this bag.

      Does this version of the Helium 15 have the water resistant down? (Down Defender)? Thanks!

      Does this come with a stuff sack?