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Lots of warmth but not a lot of weight.

The Marmot Plasma 0 Down Sleeping Bag combines high-tech fabric, Marmot's classic design, and the insulation of 900-fill down to keep you warm in sub-freezing conditions. This bag will hold back the cold during winter treks and ski tours when you can plan on the weather being being beyond chilly.

  • Zero-degree rating and an EN lower-limit rating of 3 degrees Fahrenheit means this bag will get you through a night when temps approach zero; you'll be able to sleep comfortably with temps in the low teens
  • 900-fill goose down provides serious insulation against brutal temperatures
  • Inostect Flow vertical baffle system helps distribute heat evenly from your head to your toes while reducing total weight
  • Mummy shape holds warmth close to your body, and a wrap-around foot box helps maintain loft around your the bottom of your bag so your feet don't freeze
  • DWR-treated 10D Pertex Quantum ripstop fabric offers an optimal weight-to-durability ratio and sheds moisture while remaining extremely packable
  • Insulated hood and internal collar with easy-access drawcord protect your head and neck from the cold
  • Full-length two-way zip with insulated draft tube is easy to get in and out of, and it prevents cold air from seeping in between the zipper's teeth
  • Two hang loops let you air your bag out after (or during) trips

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Marmot Plasma 0 Sleeping Bag: 0 Degree Down

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Here's what others have to say...

Climbing Kilimanjaro - Would you bring a...

Posted on

Climbing Kilimanjaro - Would you bring a sleeping bag liner with this bag, or this bag alone would do the trick?

Best Answer Responded on

I'm not going to say that I'm remotely aware of seasonal average temperatures on Mt. Kilimanjaro, but a quick number of internet searches suggest that the close you get to the top, you will be encountering temperatures as low as -20 F. While I believe having a -20F-rated bag at anything below 14K feet would be ludicrous, a OF-rated bag might be appropriate to couple with an ancillary liner to have as an additional bit of warmth detainment once you begin to reach those higher altitudes. However, I would look at guide websites and other expeditionary adventure trip websites to see what they typically recommend in terms of bag rating. I did find one good website that may help (, but just be sure to do your research. On a related note, I believe that if you did purchase this 0F-rated bag, I would bring a liner that will provide a minimum of +10F while in use, if not one that will provide an additional +20F in temperature elevation when in use, just to be safe.
Hope this helps! Good luck and have fun, sounds like a dream come true.

Unanswered Question

Climbing Kilimanjaro - Marmot Plasma 0 or...

Posted on

Climbing Kilimanjaro - Marmot Plasma 0 or The North Face Inferno Sleeping Bag: -20 Degree Down?

5 5

Best Sleeping Bag on the market!

  • Familiarity: I've used it once or twice and have initial impressions

This sleeping bag is extremely soft and warm due to the 900 fill. It packs smaller than any 0 degree bag I have found on the market.

Marmot Lithium MemBrain or Plasma?

Posted on

Marmot Lithium MemBrain or Plasma?

Responded on

Depends on if you need the weather protection of the MemBrain. My thought on the topic has always been that when I am in temps that actually warrant a 0 degree bag, water in liquid form is not much of a concern. Outside of condensation from exhalation (which can be significant), there isn't a lot of liquid water around. So I usually err on the side of weight and compressability. In that scenario I would look to the plasma. Now if you plan to open bivy and anticipate snow falling on you with nothing above you (whether it be a tarp or a tent) then maybe the Membrain is the way to go since that snow will eventually melt a little and soak in. When I have used my 0 degree bags (without membrains) in really cold conditions I have found that I am always able to just wake up and shake the ice off of my bag that froze to it overnight from breathing. So to sum up, if you are exposed to potential moisture without a shelter, get the Membrain, if you are just camping in cold conditions I'd go with the Plasma. That's my two cents.

Responded on

If you had to choose between the Plasma or the Lithium, both with no membrain, which would you choose and why? Yes the plasma is about a quarter pound lighter than the lithium, but besides that, which would you choose and why? How well do the vertical baffles work compared to the horizontal baffles?

What would you say is the most compressible...

Posted on

What would you say is the most compressible 0 degree F bag out there.... I'm really looking to save space in my pack?

Best Answer Responded on

This is probably it. You're looking for a bag with a thin shell and a high fill count, both of which this has. I can't think of any off the top of my head, but if you find a bag with a higher fill count, that's the one.

Do you have a version with a right zip?

Posted on

Do you have a version with a right zip?

Responded on

No, the Plasma bags only come in left zips

does this sleeping bag come with a compression...

Posted on

does this sleeping bag come with a compression stuff sack?

Best Answer Responded on

No, it comes with a big storage bag and a 7.5x15" (11 liter) nylon stuff sack.