A durable synthetic bag that's warm AND light? Yep, we're serious.

The Ultralamina 0 Sleeping Bag features Mountain Hardwear's patented Lamina welded, seamless construction that improves thermal efficiency and reduces weight. Ideal for cold-weather backpacking, the Ultralamina's synthetic insulation is highly packable, lofty, and durable.

  • Lamina welded construction eliminates seams for more efficient, consistent warmth while significantly dropping the bag's weight
  • Soft, super-light shell is highly wind-resistant
  • Comfort footbox allows for natural, ergonomic foot position
  • Zippered pocket at shoulder stores your watch, pocket headlamp, or other small essentials
  • Performance mummy cut fits snug for maximum warmth and packability

Share your thoughts

What do you think of the

Mountain Hardwear Ultralamina 0 Sleeping Bag: 0 Degree Synthetic

? Share a...

Write a review

No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

  • Product review:
  • Share a video
  • Share a photo

How familiar are you with the product?(Optional)

Only jpg, jpeg, png, gif or bmp files please.


Here's what others have to say...

Unanswered Question

Im exactly 6 feet tall. Better to be the...

Im exactly 6 feet tall. Better to be the maximum height and get a regular, or get the long with an 6 extra inches for wiggle room?

3 5

Good synthetic bag

  • Familiarity: I've used it several times

It is a great price and will do the job if you are not a cold sleeper. However it does not do too well in very cold dry conditions - it was a very cold bag at 17F. It is also not the most breathable bag, it gets very humid compared to a down bag. It is very good in cold wet conditions, but since I prefer to camp in cold dry, I ended returning this bag for a down bag. The price can't be beat for this bag though.

4 5

no draft collar

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

I spent 2 nights in this bag at around 15 degrees with 20-30 mph wind gusts. This bag needs a draft only complaint. Other than that it was very comfortable, dries fast, packs small and warm.

5 5

great deal, great synth bag

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

Awesome synthetic bag. Slept under the stars in 20 degree weather, was still warm (I'm a cold sleeper). Really happy with how much it can compress- you can get it super small (for a sleeping bag) with the compression sack. The synthetic material compresses really well. It's also light. I've never gotten it wet by my friend has an ultralamina and says they dry super fast. I'd def. recommend it. For the price it's a pretty good deal

Responded on

note* I'm about 5 foot 10.5 in.... I got the long thinking I could use the extra space for stuff, but there was too much space. I ended up getting the reg., and it fits quite well with a tad of extra foot room / side room for water bottle, batteries etc.

5 5


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

I just spent last night in this bag. It got down to 20F. At one point I had to open up and get my arms out because I was too hot! Love it! Nice comfortable feel to the nylon too

5 5

My favorite sleeping bag

I spent the last 5 years freezing in the springs on the Owyhee River. Waking to ice sheets on my sleeping bag. I paired my UltraLamina 0 degree bag with a bivy this season and slept warm and cozy this season.

My favorite sleeping bag
5 5

Warm and light

I needed a synthetic bag that would remain warm after days of damp hiking in the Northwest, and yet wasn't too heavy. I scoured the internet, and the MH Ultralamina was the lightest synthetic bag for the rating. (Lighter even, than many down bags.) I've used it so far on Mt. Baker and other places in the North Cascades in our spring weather and temperatures, (rainy, cold) and it keeps me cozy. I'm female and sleep pretty cold, so this bag has been perfect for me. The price is really good too, for the light weight and warmth.

4 5

'Pert-near' perfect!

As a small female, I naturally sleep cold. My first week long camping trip was full of stars, then high winds and snow... nightly temps ranging from 20-50F. On the colder nights I layered up with ski socks, thermal pants and couple fleece layers, and a hat. I stayed nice and cozy! On the warmer evenings, I didn't have to layer at all. I think the 0 degree rating is appropriate. If you are going to be in some seriously cold nights, I'd recommend a down bag... maybe -20 rating to sleep soundly and warm. The zippers are great and the bag performs very well! Light enough for small backpacking trips.. Very affordable!