This is a great bag, no question. But if I were to shop for a bag all over again, I would have coughed up another one or two hundred dollars for a bag with a Membrane water r…
- Nicholas, 10/20/11
New England

Bought a large cuz i'm 6'2" 220 and i fit great with a few extra inches. I imagine around 6'6" could sleep comfortably. It's light weight, stuffs down to the size of a pineapp…
- christine, 01/05/11
Kentucky

I've had this bag a few months now & only have great things to say about it. It's kept me plenty warm on several mountaineering trips in the Sierra's & the Cascades. I only us…
- Dustin, 06/01/10
Bend, OR

If you're looking at this bag, it's because you're intrigued by shell fabric, right? Right. So, let's cut right to the chase: the MemBrain fabric WORKS. Now, it won't keep you…
- dustin, 08/15/10
The Great (and Rainy) Pacific Northwest

This bag got the job done. I used it for 2 weeks of trekking in Nepal and it never let me down. Temps probably never got down to 15F but were definitely in the 20's 30's and…
- Ariana, 01/01/12

I used this sleeping bag trekking to the Everest Base Camp and it is fantastic. Light weight, packs small and always kept me warm. It is supper cozy and makes you feel like yo…
- Saskia, 08/20/11

I have used this sleeping bag several times this spring, I have not really tried in in lower temps (below 30) since it was so warm this spring. Overall it is very conformable…
- steve, 04/18/12
Fort Wayne, IN

Like all Marmot bags the Helium is of exceptional quality and design. Marmot keeps the weight and pack size down with this bag by eliminating the unneeded frills you find in…
- DANIEL, 03/23/09
Albany, NY

This bag is one of the best I have used a little on the warm side for a 15 degree. Compresses very well and well worth the money.…
- Steven, 03/29/12
Tucson, Arizona

You can fit two small people in here and they will be really warm. The length is a little much for someone that is 5'1". The zipper is not snagless. It would be perfect if it…
- Mark, 02/21/12

I purchased this bag last spring, and wanted to use it for an entire season before I cast my judgement. Bottom lines: Durability, Despite the bags thin light weight shell mate…
- Gibson, 01/11/11
Colorado

Super light, super soft, nice and warm when you need it. But it also has a full zip so it is also very flexible. Sometimes I use it as a quilt or if it's warm out I just sle…
- Tim, 06/18/09

I bought this bag for shoulder season backpacking in the PacNW. I'm 6'0'' and 180lbs. The regular fit was perfect, albeit snug, however, anyone taller or wanting some extra…
- JUSTIN R., 04/18/12
Portland

If you like to carry a nice light backpack when camping without haveing to sacrifice comfort for weight then this is for you!!! this bag lofts out very quick usuially about 15…
- john, 10/28/10
newark

I am 6'1" and 235 and this bag is loose on me. It has met every expectation I had including the temp rating. At anything above 60 degrees and the bag is too hot which makes it…
- Joe, 10/10/09
South Georgia

I purchased the Plasma 30 because I was looking for a way to lighten by pack. Though it feels delicate, I found to be tougher than it appears and held up beautifully durin…
- Keith, 08/20/11

I'm not so sure about the 30 degree rating... maybe more like 35. This is my first down bag, so there is a bit of learning curve about getting the down to fill the baffles ju…
- Clarke, 10/06/10
Arkansas

I love this bag! Its so light & compressible! I stuff it in a Therm-a-rest fleece lined stuff sack which I stuff w/ clothes to use as a pillow; the perfect combo! I love the s…
- Chris, 03/23/11

One neat feature is how unbelievably lofty this bag is. As soon as its unstuffed it swells up like a zeppelin, except so far it hasn't caught fire (which i appreciate, althoug…
- CHARLES A, 08/04/10
DC from Knoxville, soon to be San Francisco

Very lightweight bag, comfortable fit, and kept me warm. However, we had some condensation issues in our tent and I ended up retaining some moisture (on the exterior of the ba…
- Mack, 08/28/08
Columbus, OH

I used this bag on my recent climb of Aconcagua and almost found it to be too warm! I only zipped it up all the way when the temps dropped to minus 10F. The bag is incredibl…
- ROBERT, 03/21/09
LINCOLN

In addition to the usual suspects of short winter trips, I have taken this bag on three expeditions to the Alaska Range. I sleep plenty warm in -20 (in a tent) with it. I ha…
- Greg, 08/18/10

This is one of the best gear purchases I have ever made. I have tested it to -17 without a tent and I slept comfortably all night. Lofts as well as the day I bought it. Use…
- Scott, 05/01/11
Kansas City

I can travel with her, hike with her, carry her around and sleep with her. She goes everywhere with me and everyone I know is jealous because they wish they had one too. I…
- JOHN, 10/16/10
GAINESVILLE

This bag is super light and its comfy temp is a little less than the 40 stated. I feel I would be alright with a base layer down to 32 but have not got a chance to test at tha…
- BRYSON, 02/25/08
SPRUCE PINE

An awesome sleeping bag. I am pumped that I purchased it. It was used for the first time in Up State New York in zero degree temps and it performed perfect. I never got col…
- JARED, 01/28/07

When i first got this sleeping bag in the mail i freaked out, the size of the thing that was not compressed was huge and i never thought that it would fit in the bag that they…
- lindsay, 11/30/10