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Just so we're all clear, Helium is lighter than air.

The Marmot Helium Sleeping Bag packs smaller than a loaf of bread and can take you down to 15-degrees while weighing in at just over two pounds. Amazing? Well, yeah, but that's par for the course for Marmot.

  • EN comfort-rated at 28-degrees F for shoulder-season backpacking in the mountains; lower-limit-rated at 16-degrees F for occasional use during spring mountaineering expeditions and colder nights in the woods
  • Premium 850+ fill goose down packs down well, rebounds nicely after repeated compression, and features a high warmth-to-weight ratio
  • Ultralight Pertex Microlight mini-ripstop outer shell is highly breathable and it resists abrasion and wind like a champ, while its DWR finish repels frost, dew, and condensation
  • Recycled mini-ripstop polyester Pertex Microlight lining is smooth on your skin, breathes, resists condensation, and helps to reduce fossil fuel emissions to keep our planet healthy
  • Down-filled passive collar and full-length draft tube protect against areas where cold can creep in unexpectedly
  • Nautilus 6-baffle hood with drawcord cinches down and guards your face in drafty tents
  • Stretch tricot baffles extend the life and shape of bag, hold the down in place, and prevent cold spots to improve overall warmth
  • Large trapezoidal foot box decreases constriction at the bottom of the bag
  • Face Muff allows hood to be cinched without irritating your face
  • Entire bag weighs less than two pounds (regular) for ultimate backpacking and trekking performance
  • Zipper garage and smooth area around the face reduce chafing and discomfort when you're tucked into the bag during cold nights
  • Zipper guards prevent snagging and help to extend the life of the bag
  • Loop at the footbox lets you easily hang the bag to air it out
  • Included nylon stuff sack lets you pack the bag down to an incredible 7 x 7inch package (both regular and large) so you can easily find space for it in your pack
  • Included storage sack provides a safe place to store the bag at home and keep its loft over many years of use
  • Filled in Santa Rosa, CA to ensure quality and domestic benefits

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Marmot Helium 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:
Best Answer 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.

Bob Freeman

Member since 
Responded on

I am 6'0"and weigh 180#. I own the Lithium in Long, but bought the Helium in Reg. to save a little weight. I found I feel a little claustrophobic in the shoulders in the Regular, and have just exchanged it for the Long. If you weigh 180# or more, or just like a little more shoulder room, I suggest the Long for you.

5 5

Event Horizon

Member since 
  • Gender: Male
  • Familiarity: I've put it through the wringer

I bought this bad about 9 years ago? Maybe a little longer and I bought it because I was in the market for a down bag. I read many reviews at the time and decided to drop the serious dough on it. Since then I have used it in 10 degree temperatures never being cold except where the bag met the ground due to a bad choice of sleeping pads. You must have the right pad because where the down is compressed it is useless. I have used it in 40 degree temps though it starts to get a little too warm in the 60s but can still be used if adjusting how much of the bag lays on you above that. This bag is what turned me onto Marmot and 850+ down. Super lightweight and I have had this packed down to the size of two large grapefruit. You have to be a little careful with the zipper because it will get stuck on the material if you dont watch it. This bag has lost very few feathers by them sticking through maybe 10 I know of over 9 years. I am Large and it might be a little tighter than I like in the shoulder area but certainly not so bad I would ever give this bag up. After 9 years it shows no sign of wearing out. If you are on the fence, have the cash just buy it and thank me later. Note: ALWAYS store your down non-compressed. Long live Marmot.

5 5

Gunnar

Member since 
  • Gender: Male
  • Familiarity: I've put it through the wringer

I've camped in wet and dry, from East to West, and this thing kills it! I typically get pretty cold but not in this. Night's above 25 I can easily sleep with it unzipped like a blanket and be completely warm. Seriously love Marmot sleeping bags.

4 5

Ryan Malone

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

I only gave this 4 stars because of pone big issue that kept haunting me every night of my first trip using this puppy. The zipper snags way too easily, and when all you want to do is get into a warm sleeping bag, it can be very tedious to zip up your bag.

That said... with that out of the way, I simply can not fault this bag one bit. It is comfortable, it is big, it has wide shoulders, and it stops cold wind from entering the sleeping bag.

If you are a warm sleeper, this bag may even be too hot for you!

The bag packs down smaller than any other bag that I have owned in the past, and weighs next to nothing too.

I am around 6 ft 2 in, have a lot of extra padding around the mid section, and I ended up purchasing the long bag, and that gives me plenty of room to wiggle around, plus extra room at the shoulders.

All in all, I don't think you can go wrong with this bag at all. Just mind the zipper!

5 5

Ivan Valdivia

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

Got this bag before heading to Ragnar's Trail Experiment. Never been camping for real before, got this on a recommendation from a friend. Anyway, the weather was cold and rainy, and I was toasty warm and comfortable. I know I'm just a newbie to camping, but this Bag was AWESOME, I think I'll go camping more now, just so that I can use this bag! Disclaimer: It was not snowing, but it was probably in the mid 30's in the night. The Bag performs as advertised. Of course, I was inside a tent with 4 other people and that probably contributed to keeping us warm, but the bag merits the 5 star review I'm giving. Oh, and the fact that it compresses to a small size doesn't hurt one bit.

5 5

inafect1640789

Member since 

Only the Plasma is better and the Plasma doesnt have a membrain version so if you want a membrain (which i do living in Canada, then there isnt a better bag in the universe. (outerspace aliens dont need sleeping bags cause they have a heater control pannel built in their brains).

3 5

Dead on Arrival

Member since 

This is a basic bag. It is nice and roomy and opens pretty flat for a mummy bag. No draft collar. Draft tube is good. Zipper is better than some but still snags. Nothing fancy about the hood or bag in general. Material has a slippery feel. Seems pretty old tech to me.

inafect1640789

Member since 
Responded on

You must not know very much about sleeping bags. Go back to your Malwart specials.

Event Horizon

Member since 
Responded on

Ah....seriously?

Compact warmth

Duck

Member since 
Groups:
Posted on

Couldn't find my Nalgene, but a half gallon of belly warming Jack next to it should give you a good idea. Can't wait to actually put it to the test! (The bag, that is)

5 5

jsa4511905

Member since 

First of all I am always cold and sleep cold. I bought this bag for scouting and general camping. It's first use was in sub freezing temp. it worked perfect. I was so warm. GREAT BAG and worth the $$$$

5 5

kennon

Member since 

when i bought this bag, i was honestly lookihnng at it thinking there is nothing wrong with this bag. and there isn't. however, i wasa going to either buy this bag or the Stoic Somnus 15 sleeping bag. I originally bought this bag because Backcountry and SToic did not put the fill weight on their site, so I did not know truly how warm it was. When I found out that the Somnus had only half of and ounce less thatn the Helium, I made the return. When comparing, there are a few reasons why. First of all, the Somnus weighs 2 ounces less. I weighed it and mine came in at actually 31 ounces, so that would be 3 ounces less. The second reason is because I bought it when it was at 40% off, so I saved at least 70$ ( the Helium was also on sale). gain, I loved the Helium, and it is a great bag, but if you count ounces and want to save money, buy the Stoic somnus 15. By the way, it has an ounce less, has a longer shoulder girth, but is I think 3 inches shorter, so I would say it is rated at about 18-22 degrees European Norm Lower Limit. Also, buy a separate stuff sack. The provided stuff sack weight about 4 ounces, so when you compare the weights of the Helium and the Somnus in their bags, they actually weigh the same. A Marmot XS Bag works great for the Somnus.

5 5

Zach Levy

Member since 

Great bag, bought it for a two week backpacking trip and have used it in all kinds of weather, warm enough for those cold new england nights and not too warm for a hiking trip through New Mexico. My favorite part is that i can get this bag smaller than my own head, possibly smaller. No down leakage yet so the seams are good. It has a waaterproof coating but if u want to use it for extended periods in wet environments u may want to get the membrain version. Classic Marmot down quality.

5 5

Dane

Member since 

This is one amazing sleeping bag. I have had this bag for a few years and it has yet to disappoint me. This bag is rated 15 degrees however I have pushed it to 0 and -17 with a bivy sack. With a compression sack this bag can get down to a small cantaloupe or musk melon. This bag will make you not want to get out of bed in the morning.

I am 5'10 and heavy set. Was considering...

sno4392325

Member since 
Posted on

I am 5'10 and heavy set. Was considering purchasing the long version of this bag for a little more wiggle room.
Good or bad idea?

Dave Marcus

Member since 
Responded on

62" is pretty good for a lightweight bag shoulder measurement. If you get the long for the extra 2", you also gain room in the footbox to dry gear or keep it warm - boot liners, water bottles, socks, etc.

Your alternative is to look for bag with larger shoulder and hip measurements.

Andrew McManama

Member since 
Responded on

Don't forget that the extra space at the feet can cause cold air pockets near your feet, I would see if there is a wide option available though if you say you are heavy set.

5 5

Matthew Forrest

Member since 

This is a great bag. Super light and warm. I have found that sleeping bags are always too hot to sleep comfortably even venting with the zipper, it can be really hard to dial into a comfy temp. This bag has the widest temperature range I have ever seen with a bag. I have found it comfortable from 60 to 20 degrees. If you only want to buy one bag this is a good choice for all but full on winter camping. I usually sleep warm but froze in this thing at 10-15 degrees (I know it is below its rating). I prefer the pinnacle bag because I found it comfortable at 5 degrees and could have gone well past zero. The pinnacle bag has a better, warmer foot box, a draft collar and a better hood but the same loft through the torso. The foot box, draft collar and hood add some weight but make a BIG difference when it gets in the single digits. I did find the helium to breath better.

5 5

Brandon

Member since 

Looks good, feels good, is so fluffy like sleeping on whipped cream!. Compresses great, i got it just after a trip to the Enchantments in WA two years ago and have loved this bag since. I sleep cold so used to use marmot trail liner but bag is plenty warm by itself. I am 5'7" ish and so have some room at bottom for next days socks and etc. Used stuff sack as pillow with fleece in side and worked out pretty well also.

I'm 5'10', 155 pounds and am doing the...

Barry

Member since 
Posted on

I'm 5'10', 155 pounds and am doing the trek to Everest Base Camp next May. Will the Helium be sufficient?? thanks

Michael Lindsley

Member since 
Best Answer Responded on

I would recommend seeking out something a bit more heavily insulated. The thinner air, and ambient temperatures, at Everest (even at the base where it can easily reach -15F or lower) can make a person feel colder than normal. For this reason I would purchase a bag insulated to around -15F lower than what you plan to expect for a good comfort rating. Mountain Hardwear and Patagonia make excellent -30 degree bags you may like to consider.

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