Marmot Plasma 15

2 reviews
5-star:   0
4-star:   2
3-star:   0
2-star:   0
1-star:   0


Regular Long
Weight 1 lb 14.2 oz / 864 g 1 lb 15.96 oz / 906 g
Fill Weight 17.64 oz / 500 g 19.41 oz / 550 g
Sizes 6 ft 0 in 6 ft 6 in
Zip Option LZ LZ
Main Material 10 Denier 100% Nylon Micro Ripstop DWR 0.8 oz / yd 10 Denier 100% Nylon Micro Ripstop DWR 0.8 oz / yd
Lining Material 10 Denier 100% Nylon Micro Ripstop DWR 0.8 oz / yd 10 Denier 100% Nylon Micro Ripstop DWR 0.8 oz / yd
Insulation Material 900+ Fill Power Goose Down 900+ Fill Power Goose Down
Price $469.00 USD $489.00 USD



Excellent sleeping bag. Compressed well. Light. Held…

Rating: rated 4 of 5 stars
Source: bought it new
Price Paid: $380


Excellent sleeping bag. Compressed well. Light. Held up fairly well for a 50-day thru hike with only one small tear.


  • Roomy
  • Warm
  • Light, compressible


  • Zipper gets stuck (like most bags)
  • Outer shell can tear, be gentle

Excellent bag. I used it for a 50-day thru hike and it held up well. It developed one small hole after a long time and I did lose a little down from it.

Admittedly it did not get much below 35 deg F during my hike, so I did not test all the way down to 15. I do believe that it could take this. I never got cold on the chilly nights and only wore one layer lightweight thermals in the bag.

Lightweight compressible, packed well in the bag. Held up to the multiple packing, unpacking and kept loft. I am taking advantage of Marmot warranty and laundry service to recondition the bag after the long trip. 


Truly the most comfortable bag one could ever sleep…

Rating: rated 4.5 of 5 stars
Source: received it as a personal gift


Truly the most comfortable bag one could ever sleep in, plus it's pretty damm sexy as well... Did I just say that?


  • Lightweight
  • Roomy
  • Packable
  • Full length zipper
  • Built-in pillow
  • Vertical baffles


  • Price

I must admit when I first saw this bag at REI for the first time I fell head over heels. Three months later I got it for Christmas and had to test it out immediately.

So, for her first outing I took her up to Jerky Meadows in the Golden Trout Wilderness where the temp was around 14 degrees. My first night after a couple of scotches was pretty much as I expected.... Heavenly. I don't remember waking up once in the night to adjust myself or to put on extra layers just a good long night rest. The pillow that comes in the hood, even though small, still made a difference with a stuff sack with my jacket in it. 

Now I know a good bag is priceless, but when you see the price tag just try not to puke. I have to admit even though it was free I would not hesitate to pay full price for it. That's how bad ass she is.

Where to Buy

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Manufacturer's Description

Visit Marmot's Plasma 15 page.

Retailers' Descriptions

Here's what other sites are saying:

No, you're not dreaming. The Marmot Plasma 15 Sleeping Bag comes in under 2 lbs. (regular length) with 875-fill-power, water-resistant goose down--backpacking season can't get here soon enough!


The Marmot Plasma 15 Sleeping Bag is an amazing 3 season bag that is ultralight and designed to be the most evolved sleeping system on Earth. Pertex(C) fabric forms a breathable water-resistant barrier to protect against the elements. The 875+ fill-power goose down has been updated with a Down Defender treatment offering an extra level of moisture protection.The Plasma uses Insotect Flow vertical baffles, which help bring heat to the wrap-around footbox. Certified 875 fill power down Down Defender to Improve Water-Resistance in Wet Conditions EN tested Two Way Zipper Sliders Heat bump draft tube Hood draw cord positioned for easy access Insotect Flow Vertical Baffle System Reduces Weight and Transfers Heat from the Core of Your Body to Your Extremities Velcro -free Face Muff Wrap Around Foot Box Construction Incorporates Flow Design with Marmot's Classic Trapezoid Shape Stretch tricot baffles provide ultimate strength, durability and bag life Stuff and storage sack included Two hang loops

- OMCgear

Marmot Plasma 15F 900 Down Sleeping Bag - Regular Size When you want the very best, the Marmot Plasma 15F 900 Down Sleeping Bag - Regular Size won't leave you cold. Marmot's high-quality bag features the best down and highest fill, packed into ultralight 10 Denier Pertex Quantum Fabric that doesn't sacrifice durability.

- SunnySports

Brainiac scientists tell us that the sun's made primarily of plasma, so it stands to reason that Marmot would make the Plasma 15 Down Sleeping Bag out of the same hot-hot-HOT material; unfortunately, Marmot's bag designers couldn't quite figure out how to sew plasma and magnetic fields into a functional sleeping bag, so they opted for 875-fill goose down wrapped in bulletproof Pertex Quantum fabric for the ultimate combination of warmth and lightness. The Plasma's designed to be comfortable in chilly temperatures: as low as 15 degrees, with a comfort rating of 29 degrees. It weighs less than a galaxy's worth of anti-matter--just under two pounds--and packs down smaller than the beginning of the Big Bang, so you won't notice it in your pack any more than you'd notice a few extra protons. This combination of weight and warmth is made possible by the Insotect Flow vertical baffles, which direct heat downwards to the wrap-around footbox, minimizing the amount of down required to keep you toasty. Down also loses most of its insulating value when it gets wet, so Marmot designed the Plasma an inner and outer DWR coating, and treated the insulation with Down Defender, which helps it maintain loft it things do get a little soggy. There are also small touches that make a big difference, like a cold-air defeating insulated draft tube, insulated collar, and face muff to seal your bag up tight against the chill; if you get cold, it's probably because you've taken the Plasma somewhere it doesn't quite belong, like the moon.