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Snow + wind = wet + cold. MemBrain 2L + down = dry + warm.

Pro alpinist Fabrizio Zangrilli uses the ultralight Marmot Helium MemBrain 15-Degree Sleeping Bag to stay warm and dry at the top of the world, so odds are that this down sleeping bag will work for you, too. Marmot’s waterproof breathable MemBrain construction repels snow and water while expelling perspiration so you can take full advantage of the toasty down insulation without worrying about it clumping and leaving you high and wet.
  • EN comfort rated at 25.5 degrees F for cozy three-season use; lower limit rated at 14 degrees F for occasional use during winter outings
  • MemBrain 2L waterproof fabric helps shelter the down insulation from external condensation, snow, and water
  • MemBrain 2L fabric is also highly breathable so evaporating sweat won't condense inside the bag and cause the down insulation to clump
  • Lightweight 850-fill goose down insulation offers a superior warmth-to-weight ratio and rebounds well after repeated compressions
  • Nautilus 6-baffle hood with down-filled collar and drawcord guards your face in drafty tents
  • Stretch tricot baffles extend the life and maintain the shape of the bag and improve warmth retention
  • Face Muff allows hood to be cinched without irritating your face
  • Large trapezoidal footbox decreases constriction at the bottom of the bag
  • Nylon stuff sack and cloth storage bag included

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Marmot Helium MemBrain Sleeping Bag: 15 Degree Down

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Here's what others have to say...

Hello. I want to purchase this bag but...

madp311624

Member since 
Posted on

Hello. I want to purchase this bag but can't decide on length. I am 5'11.5" and will use this bag for 3 season use. Regular or long?!?!?!?! Thanks.

Arthur Debowski

Member since 
Groups:
Responded on

I am 5'10 and use this in a regular and find it quite roomy. I don't think you will need the extra 6" of the long.

Eli Hauschild

Member since 
Responded on

I agree with Arthur. I am between 71-72", 160lbs, and I use the regular size in Marmot sleeping bags. I am comfortable with the amount of space it provides. No need for the extra 6" like Arthur said.

5 5

Andrew Mark

Member since 
Groups:

Marmot has a terrific product here, I usually go to Marmot for all of my down products, and this was no exception. It's extremely light weight, compresses down into the stuff sack very easily, and could be compressed more if you wanted to buy a compression sack for it. Has definitely kept me warm in 0-10 degree situations with minimal or no layers on. I haven't had to test the waterproofing of the MemBrain technology as I keep my down products extremely dry all costs, but I have faith in it. I have had some heavy dew on mornings when I've slept out of a tent, and there was no issue with the bag.

I really have nothing negative to say about this bag, and will continue to use Marmot almost exclusively for my down products.

Is this bag available in right zip? My...

melp46780

Member since 
Posted on

Is this bag available in right zip? My girlfriend has this bag in a left zip and I want to be able to zip them together. If so when will you have them in stock or is this a custom order type deal?

Chase Bolt

Member since 
Responded on

This is not true. I have talked with live chat and over the phone. Backcountry does not place custom orders for a right zip, unfortunately.

Does the membrane version of this bag have...

dfpp136559

Member since 
Posted on

Does the membrane version of this bag have an internal dew point? I have a similar mountain hardwear bag, that I feel damp and clammy in.

Guy Geva

Member since 
Best Answer Responded on

There is no rating for dew...keep you sleeping bag open after the trek for dry it. if it to mach dew on the trek you need a synthetic sleeping bag that can take better dew

5 5

Brian

Member since 

Incredibly small and light for its rating. Had it out in 20 degrees and was hot wearing thermals. The bag has seen some water, it shed it with no problems to date. Fits well around me without feeling claustrophobic, I'm 5'9, 140. This bag is amazing for cold weather but be prepared to get a warmer bag for summer.

i have a hard time believing that this bag...

bobby

Member since 
Posted on

i have a hard time believing that this bag packs down to 7x7"
if it does i would buy it, but 7x7 and 7x15 is a huge difference.
are you sure its not a typo? it is misleading and should be taken care of if so.

conan

Member since 
Responded on

I have not checked this one out but down bags can pack very small. My Lafuma bag that is the same temp fits in a stuff sack that I can squeeze down to a smaller size than 7x7 so if anything I would guess it takes up less space than 7x7inches.

Mads

Member since 
Best Answer Responded on

I was curious about your question so I tried it myself. I packed the Helium into a Granite Gear size XS compression sack and cranked it down to 8" tall and 6.5" across. Pretty small, as you can see from the photo that compares the compressed bag to a Nalgene. Hope this helps!

I was curious about your question so I tried it myself.  I packed the Helium into a Granite Gear size XS compression sack and cranked it down to 8" tall and 6.5" across.  Pretty small, as you can see from the photo that compares the compressed bag to a Nalgene.  Hope this helps!

I am trying to decide between this bag &...

stubowling2357612

Member since 
Posted on

I am trying to decide between this bag & the new RAB Neutrino 400 or 600 bags (I have just purchased, but not yet used, a RAB Neutrino Endurance downie & it looks excellent). The Marmot by dimension seems to be a lot roomier, a comment some have made regarding this bag; not sure if I think this is a good thing as it equates to more air flow, particularly with no draft collar & probably meaning a colder bag? The RAB's seem to be a lot slimmer cut (truer mummy shape) & hence are probably more efficient? Can someone comment on this please? Also, how would people rate the outer fabrics of the 2 bags, the Membrain sounds like it is near waterproof yet the RAB's Pertex Endurance is pretty close to waterproof. As there are no reviews on these RAB bags yet any commenst / descriptions would be very useful in helping me decide. Thanks :-)

Guy Geva

Member since 
Responded on

This "Marmot" is not slim for it to b hot in a coold days...I'll take th"Rab"

5 5

Isaac Rogers

Member since 

For the majority of situations this bag works perfectly. The fill makes it comfortable in all but the coldest winter weather and the shell sheds condensation like no other bag in its class. It's not fully waterproof and that is a good thing because fully waterproof bags are much heavier and when the only water you are trying to shed is condensation it works perfectly. I used to have the non EQ helium and the shell was much thinner and condensation would ruin the loft on long treks. The EQ version fixes both of these problems and is all around a more sturdy feeling bag. Definitely worth the extra cash over the original.

5 5

tblack

Member since 

Clear Michigan January sky, stars bright as headlights, 15 mph wind, -10 F.
Slept on a tarp, z-pad, a thermarest and with a poly bag liner. Warm and cozy!
Of course I had all my clothes on, two hats and a light pair of wool liner gloves. But I still pushed this bag 25 degrees!
If I slept in my MH EV-3, I probably would still get a great night's sleep at -20 degrees.
Don't think about the cold money, think about a warm sleep. Sweet dreams!

5 5

jeremesh

Member since 

I haven't had the opportunity to try this out in the cold yet but I am a big guy, 270 pounds and I have plenty of room in this bag. Just trying it out in the house, I was sweating after only a minute in the bag. Can't wait to get out there and try it in the cold.

4 5

James

Member since 

Took this bag into heavy snow and outside temps below 10 degrees. Inside tent the temps were slightly higher. Bag worked well, it was cold, snowing and damp all week, with over 10 inches of snow accumulating on the already 6 inches. Bag worked well. The weight and packability combined with the 15 degree rating and Membrain were the draw. I'm 5'10" and 190 lbs. it's just slightly snug in the shoulders, but hey, its camping.

3 5

mat4170168

Member since 
  • Gender: Male
  • Familiarity: I've used it once or twice and have initial impressions

Got this bag a few weeks ago and decided to try out it's warmth by camping out in the back yard on a 25�F night. This bag is very light and would be great for backpacking. However, I found the draft flap to be inadequate. I don't know if it's drafty due to it's lightweight design or if the bag I received just had a flaw, but I had a hard time getting the flap to stay put. I also found the drawstring on the hood to be difficult to cinch down. Both of these items made it difficult to take full advantage of the 850-loft down, so given the price of this bag I decided to return it and go with the Marmot Pinnacle instead.

5 5

scu3518522

Member since 

Excellent quality Sleeping bag.
I've tested it with 12 ° F and I could sleep in a bivouac sack
Lightweight and compact. Highly Recommended

Why is this bag so light?
Where is different...

Yoko Ikeda

Member since 
Posted on

Why is this bag so light?
Where is different from "Helium(not EQ)" in this?

moroni

Member since 
Best Answer Responded on

The Helium EQ has a breathable/waterproof "Membrain" shell whereas the standard Helium uses a pertex shell. The lightness is due to 850 fill down being used.

KCOAG

Member since 
Responded on

The listed [Reg] 21oz (552.8g); [Long] 24oz (680g) is only the fill weight.. not the bag weight people. This bag is 2 lb 8 oz / 1.05 kg (Reg)with sack.

5 5

Connor Henderson

Member since 

This bag is so sick! It's so warm and packs down super small! I used this with my bivy the first time and the Membrain did a good job of keeping the condensation off of my bag and kept me dry. Love it!

Is this the old EQ or the new Membrane? ...

tob4031149

Member since 
Posted on

Is this the old EQ or the new Membrane? Is the zipper the same as on the Pinnacle? Also, is there a bottom-up zipper (can't tell from the photo).

Thanks.

Tim Coats

Member since 
Groups:
Best Answer Responded on

This is the new Membrain version and yes it has a full length double slider zipper like the Pinnacle.

Sean Parchem

Member since 
Responded on

I had a chat with a marmot rep and was basically told that the new membrane is the same as the old EQ fabric. They just had to change the name of the fabric. The pretex shell is lighter than the membrane though. Which I actually prefer

5 5

Joey Sweeney

Member since 
Groups:

Great bag! I took this bag out on a couple of trips in the Uinta mountains and it performed just as expected. Super warm and comfortable with a great stretchy feel to it. I have felt a little confined in mummy style bags in the past but this bag had plenty of room and packed down extremely small. I also put the waterproofing to the test and it worked like a charm. The bag was in the stuff sack exposed to the rain for about 30 minutes while we set up camp and it came out dry. Great bag worth the $$$.

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