Marmot Helium EQ Sleeping Bag: 15 Degree Down - 2008 BCS

Awesome bag. Seriously, one of the lightest bags on the market, as well as one of the most comfortable I've been in. Get a compression sack to go with this bag though, the stuff sack it comes with is super thin and seems like it would tear easily.

All in all, a great product.

Very light weight & very comfy. Spent a four nights at 9000 ft elevation in Wyoming early Sept. One night was particularly warm so I opened the bottom and top very comfortable. Another night woke up to frost & little bit of ice and did not feel at all cold! I'm broad shouldered and usually feel a little cramped - not in this bag.

Great bag. Packs down to almost nothing. Easy to mate with other Marmot bags, if you want that queen bed sized feel going on. Lil warm for summer camping, but just toss it on top of yourself when you finally get that late nite chill.

I compare my backpacking cost to nights at a hotel. For the price of 3 nights at a med price hotel you get an outstanding bag. I have slept down to 25 degrees and was very comfortable. Very lights and also comforting to know that it is waterproof. Some reviews complain about the stuff sack but I have found it works find to roll the bag up best you can, put it in the bag, and then push the remaining bag into the stuff sack - works fine. Calculate how much you have invested in backpacking stuff then divide it by the nights you plan on using it and it gives you a value equation.

After having my last marmot bag for over 12 years, it finally needed to be replaced. The Marmot Helium EQ is warmer, lighter, more durable, and compacts much smaller than any other bag I compared. With constant trips in the San Juans, as well as being a Wilderness First Responder, this is the ultimate bag for any situation. Believe me, it is well worth the price!

This bag is the all-star of all my gear. I could not believe how fast the warmth developed! Bag is lightweight, compresses down to nothing and packs easily. I especially liked the zipper design since it did not get hung on the nylon material like other bags I've used. Buy it!

This bag is super light and really warm. I've yet to use it on any really cold nights (like below 30 degrees) but so far I haven't had any issues. I'm 5'8" and I have an XS and it has plenty of room. The stuff sack it comes with is pretty tight and every time I think there's no way it's going to all fit in there but it always does.

Best sleeping bag ever. I've never been so comfortable in a bag before, so soft and warm. I've been sleeping i this bag in 15 F and felt totally comfortable and warm. But then again, I don't feel the cold that easily. Have tried the bag in colder temperatures, but then I was sleeping in a tent. But I have never felt uncomfortable in this bag. So if your looking for a 3 season bag that can stand to get a little wet. Get this bag. For what you get, this bag is very light, and did I mention it was comfortable?

I got the long bag and it fit me well at 6'1" 195 lbs. I slept in 20 deg F, and was warm and comfortable. The water resistant coating (EQ) cuts the wind and the rain. It only came in a left zip, which is less convenient for my right zip bivies. This great 15 degree bag only weighs 2-1/2 lbs. The Marmot stuff sack is no good. The sack ripped by the entrance on the first trip. Get a good quality small compression sack to go with this super bag.

I've been using the Helium for a little over a year and sadly I'm sending it back. I've used it mostly for backpacking trips (desert, beach, mountains)...and I've never been cold. The coldest temps I've used it in have been the upper 30s low 40s. However, I started to notice an increase in stray feathers after only a few uses. This trend would continue to the point where I had about 7 duct tape patches. All the feathers were escaping where the baffles intersected...there were no rips or tears. This seems like a lot of wear and tear for a $400 sleeping bag. Too bad, I really liked it's performance and weight. Oh, and the left hand zip was pretty frustrating in a right handed bivy with not a lot of room to maneuver.

What is back is: High end for of Spring, Fall, and not extremely cold Winters. Best used for mountaineering or long backpacking trips in cool weather.
The most impressive feature is the stuff/compression and expansion size. It fits into a XS Marmot stuff sack, which his 14x7 inches. Think of an Xbox 360 smushed into a cylinder. You look at the stuff sack and say ‘There is no way it will fit into that’ but it does. The down is comfortable and expands to the fullest. The weight is one of the lightest on the market. I weighed it on a food scale and in the stuff sack; it weighed 2 lbs 8oz. It is very warm as well. There is an inner flap behind the zipper so no heat can escape of cold air let in. I used the bag, under the stars in late spring. The weather for the night ranged low 50s to high 30s F. The bag was so hot I woke up and had to unzip it all the way and use it as blanket until 3:00am or so.
What this bag is not: Not used for Car camping, Summer time, novice users (Boy Scouts/Summer Camp)
It is not a summer bag. Any temperature above 40 degrees F the bag is pretty much useless, as it is too hot. This is not a roomy or comfortable spacing bag. To cut down on the weight Marmot cut down on the size. You cannot lift one knee. It is very snug and mildly cramped, based on my size. I am 5'11 160lbs with broader shoulders. I used the Regular version.
Two other features to note; the zipper does take a few moments to get use to. The inner flap does catch in the zipper if you do not run your finger ahead of the zipper when opening/closing. Also getting out of the bag is not a straight shot. It does take some finesse and slight patience.
However if you want a bag with the smallest stuff size, with the lightest weight while not too concerned about sleeping room, then this is your bag.

This bag is the epitome of sweetness. I love the fact that I don't need to worry about condensation, or a wet jacket, or morning dew. Super warm - I tried it on a summer trip in the Sierras and it was way too hot. Instead, I've used it in shoulder seasons and winter, doubling up with a down jacket. Expensive, but worth it.

Having only had a cheap pathetic bag in the past, a comparison would be foolish. I was so pleased that we could afford to buy good bags; I had high hopes that it would be money well spent. I have not been disappointed, these bags are excellent. We just used them on a trip to Anza Borrego, where the night time temps were in the 50s but with the full length zipper, it was easy to ventilate the bag to avoid being too warm. If you're looking for a great three season bag, this is it.

Comfy, warm, and light weight. The Marmot Helium EQ 15 degree down sleeping bag was perfect for my camping trip to a local lake. Although it was 100 degrees during the day, I was stoked to have this bag for how warm but light weight it is. Doesn't take up a lot of space but the only reason I didn't give it 5 stars was because I felt like it was a little difficult to put back in it's carrier. What a small price to pay for such a nice bag...I'm very happy with it!