Marmot  Helium Down Sleeping Bag

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Remarkably light and compact, the 3-season Marmot Helium delivers impressive warmth and comfort in a durable, water-resistant, 800-fill-power goose down sleeping bag.

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Features

  • Ultralight Pertex Microlight 20d nylon ripstop with durable water repellent finish is resilient to wear
  • Certified 800-fill goose down with Down Defender treatment for improved water-resistance in wet conditions
  • Fold-down second zipper provides added ventilation and easy bag access
  • Nautilus multi-baffle hood envelopes your head in warmth; adjustable drawcord cinches hood about your face
  • Anatomically designed footbox with wrap-around construction allows down to loft fully around your feet for optimum warmth and comfort
  • Smooth, curved baffles reduce down shifting; stretch tricot baffles provide strength and durability for long bag life
  • Insulated draft tube backs a full-length, 2-way, snag-free zipper to prevent cold air getting in
  • Internal stash pocket stows nighttime essentials
  • Zipper garage keeps zipper pull in its place at night
  • 2 hang loops for storing and airing out sleeping bag
  • Stuff sack and storage sack included

Imported.

Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.

Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Marmot Backpacking Sleeping Bags

Technical Specs

Best Use

Backpacking

Tested Lower Limit

13.5 degrees (F) - EN

Tested Comfort

25.2 degrees (F) - EN

Temperature Rating (F)

15 degrees (F)

Temperature Rating (C)

-9 degrees (C)

Shell

Nylon

Zipper Location

Left/Right

Insulation Type

Down

Water-Resistant Down

Yes

Fill

800-fill goose down

Lining

Nylon

Sleeping Bag Shape

Mummy

Stuff Sack Size

7 x 14 inches

Stuff Sack Volume

8.8 liters

Gender

Unisex

Reviews
104 reviews with an average rating of 4.7 out of 5 stars

Ratings Snapshot

Product Rating

70 out of 74 (95%) reviewers recommend this product

Review this Product

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Most Helpful Favorable Review

5 reviews with an average rating of 5.0 out of 5 stars
So nice I bought a backup
Rockhound
8 years ago
I've had a Helium for a year or more and just love the soft silky feel, plus it does a great job of keeping me warm. When it hits about 20 I need to put a blanket or something on top, but I sleep really cold, so I think a normal person would be comfy at a lower temp. I love this thing so much I was awake one night thinking about what I would do if I wore the darn thing out (not likely, I have Marmot bags from the 1990s that still work fine), so I decided to buy a second one for a backup. Some people like having extra jugs of water and cans of food in their basement for emergencies, but with a second Helium, I think I can weather about anything now, and I sleep like a baby. This is the most comfy and luxurious feeling bag I've ever owned, and I'm a sleeping bag junky. I have several Marmots (including a newish Hydrogen and Trestles, along with an old Raging Inferno), several North Face, and a couple of more generic brands, not to mention the ones I've given away. Some women buy shoes, I buy sleeping bags. I love this bag.
Rockhound
W. Colorado/SE Utah
34 people found this review helpful

Most Helpful Critical Review

5 reviews with an average rating of 3.0 out of 5 stars
Not worth the money
Safari525
7 years ago
Had one for 3 years, before it got swallowed by the mold monster in Hawaii. It was a great bag at first, however like all down bags they lose loft and warmth over time. I found it nice and plump after a wash, but quickly it was back to feeling like a gross bag. The lightweight material must absorb sweat incredibly fast. In my opinion if your a springtime mountaineer, great choice, and the only possible reason for buying this bag. However, for backpacking even in cold weather get a 30 degree for half the price or less. Bags like the Marmot Elite Tressels have near the same weight and packing ability. Also there is no stress with a cheaper bag when your cowboy camping, sitting by the fire, etc. Once in awhile you need to layer up with a 30 degree, but trust me this Helium was nothing close to a Winter bag either and like I said in the title, not worth the price.
Safari525
Mammoth Lakes, CA
6 people found this review helpful

Customer Images

thanehousedotcom
Monterey, CA
Rated 5.0 out of 5 stars

Beautiful Bag to Carry on the Tradition

4 years ago

[This review was collected as part of a promotion.] I've been buying Marmot as much as possible since I was a teenager. I'm old now. My kids are starting to need good gear now so I recently purchased a Helium for my son. It might be even better than the bag I used to cyclotour for a few years in the Americas. Quality over the years may have improved! I know this will be the last bag he really needs until he passes the Marmot torch to his friends, girlfriends, wives and kids. If you buy a Marmot and it is still going after over a thousand eight-hour sleeps in countless climates, the zipper keeps going after more than 5,000 zips. You tend to want to stay with Marmot.

Yes , I recommend this product
Originally posted on marmot.com
Rockhound
W. Colorado/SE Utah
Rated 5.0 out of 5 stars

So nice I bought a backup

8 years ago

I've had a Helium for a year or more and just love the soft silky feel, plus it does a great job of keeping me warm. When it hits about 20 I need to put a blanket or something on top, but I sleep really cold, so I think a normal person would be comfy at a lower temp. I love this thing so much I was awake one night thinking about what I would do if I wore the darn thing out (not likely, I have Marmot bags from the 1990s that still work fine), so I decided to buy a second one for a backup. Some people like having extra jugs of water and cans of food in their basement for emergencies, but with a second Helium, I think I can weather about anything now, and I sleep like a baby. This is the most comfy and luxurious feeling bag I've ever owned, and I'm a sleeping bag junky. I have several Marmots (including a newish Hydrogen and Trestles, along with an old Raging Inferno), several North Face, and a couple of more generic brands, not to mention the ones I've given away. Some women buy shoes, I buy sleeping bags. I love this bag.

Yes , I recommend this product
Helpful?
crystalphoto
Cary, NC, United States
Rated 5.0 out of 5 stars

Great bag!

8 years ago

I took this bag on my 2016 Appalachian Trail thru-hike and with a silk liner I stayed warm in March / April throughout the Smokies. Great bag. Just zip it up and down carefully or you will snag the material and tear it.

Yes , I recommend this product
Helpful?
punchcard
Rated 5.0 out of 5 stars

Perfect

9 years ago

Used on Shasta in May -- Was perfect for 20-30 degree weather -- very warm, very light, and good price point in this category.

Yes , I recommend this product
Helpful?
Gumpventures
Costa Mesa, CA
Rated 4.0 out of 5 stars

Light + Comfy but not as warm as desired

5 years ago

Been using this bag for about 4 years, mainly summer to early fall backpacking trips in the sierras. I bought it due to great reviews and excellent weight to warmth ratio. No complaints about the weight, but I'd trade a few more ounces for a bit more warmth if I could go back and purchase again. I'm 5'10 male 165 lbs and it fits impeccably with comfy hood. It has always gotten me by, but many nights in the 20s to low 30s have definitely resulted in a chilly sleep with cold feet. Nice construction and a fantastic lightweight bag for mid 30s and up backpacking, but I'd invest in a slightly heavier bag with more down if spending a good amount of time above 10k'.

Yes , I recommend this product
Originally posted on marmot.com
Jetfisher
Montreal,Quebec, Canada
Rated 5.0 out of 5 stars

12 years of great service.

6 years ago

Simply the best! Bought the helium long back in 2006 and I’ve slept an average of 30 nights a year, the bag has a few patches here and there but is still going strong and performs like new! However I’ve gained a little shoulder width in the last years and find the bag too tight so I gave the helium to my wife who loves it. I’m in the market to buy another one just wish Marmot would make the long version a little wider add interior neck baffles.

Yes , I recommend this product
Originally posted on marmot.com
GoVaughan
California
Rated 5.0 out of 5 stars

Just right

8 years ago

I just completed a first backpack trip with my new Helium. The temperatures dropped into the high 20's with strong winds. The bag was comfortable in tent with long johns and cap but I would put on more clothes if colder. The bag is a perfect three-season balance between weight and warmth. The Nautilus hood is great and at 6'1", the regular bag just fits me, thanks to the ergonomic foot-box design. I can't imagine a better balanced bag with 800 fill ingredients for weight and warmth. The stuff sack could be a bit larger to more easily conform to the interior of my pack and for easier stuffing.

Yes , I recommend this product
Originally posted on marmot.com
Emily Marmot
CA
Rated 5.0 out of 5 stars

Survived Alaska Mountains

3 years ago

[This review was collected as part of a promotion.] Purchased this bag for a mountain hunt in Alaska this past August. It snowed almost every night and rained every day. I chose this bag to save on weight, so within the bag I wore water repellent down coat (hooded) and pants. I noted the bag continually picked up humidity as the trip proceeded with some loss of heat retention. Overall, I managed to stay relatively warm, especially when extra care was taken to prevent wind from whipping through the tent. I used a minimal R-value ~3 foam pad. Overall, am happy with the performance of the bag and would bring it for another mountain adventure.

Yes , I recommend this product
Originally posted on marmot.com
nickagillie
Dayton Ohio
Rated 5.0 out of 5 stars

7 rough years in many different states

7 years ago

I purchased 2 helium sleeping bags in 2010. One long for me and one female specific for my wife. They are incredibly comfortable, warm, and lightweight. I slept on just a tarp without a tent and slept in this bag for around a year while I traveled around the USA. It was surprisingly tough, especially for how silky and soft it feels. I would purchase these bags over and over and over again. Thanks marmot!

Yes , I recommend this product
Helpful?
MikePf45
Upstate NY
Rated 5.0 out of 5 stars

Perfect Balance

6 years ago

This bag is an absolute winner. Cheaper than most true ultralight bags, this thing is still pretty light at just over 2lbs and it still packs down small. It's got a great amount of loft, the water resistant (Down Defender) treated goose down worked great and still kept me warm while sleeping in super damp conditions in a lean-to. Mist and rain settled on the bag but did not soak through. I normally sleep cold and this was the perfect upgrade from a 20 degree bag; the EN limit is 10.4, which is actually at least 10 degrees warmer than most 20 degree bags. At around freezing temp I was even a bit hot and slept without base layers. The second side zip was useful for venting out some heat. I'm about 6ft and it was really comfortable and spacious with lots of shoulder room and a big foot box in size Reg, any taller and I would go with the Long. I think the Helium strikes a meaningful balance by being more durable (30D nylon), warmer, less constricting and slightly less expensive than most ultralight bags for just a few extra ounces in your pack. Definitely the perfect bag for me.

Yes , I recommend this product
Originally posted on marmot.com
1 - 10 of 104 Reviews

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