A workhorse sleeping bag that won't leave you shivering at night.

Utilizing highly efficient Lamina construction, the Mountain Hardwear Hyperlamina Torch 0 Degree Synthetic Sleeping Bag delivers the warmth and compressibility of down with the workhorse qualities of a synthetic fill bag. Lamina construction eliminates cold spots through a process that welds the fabric directly to the insulation—this increases the overall thermal efficiency of the bag. In addition to its Lamina construction, the Bag also features zoned insulation, which places additional warmth around your core and feet. An ergonomic draft collar and face gasket work together to trap warm air on those cold nights, while a performance mummy cut and comfort footbox ensure you stay warm and comfortable during cold, winter camping trips, visits to the alpine, and late-season backpacking in the high country.

  • 0F temperature rating
  • 16F EN comfort, 3F EN lower limit
  • Thermal.Q insulation
  • Lamina construction with zoned insulation
  • Performance mummy cut
  • Ergonomic draft collar
  • Face gasket
  • Half-length center front zip
  • Comfort footbox
  • Compression sack and storage sack included
  • Reviews
  • Q & A

Warm but bulky

  • Familiarity: I've used it several times

This bag kept me warm in 20 degree (F) weather where it was also very windy. It feels good to the touch, seems to be built with quality in mind, and is comfortable and lofty. The only caveat; this is more of a car-camping bag. It compresses to the size of an over-inflated basketball and takes up a lot of real estate in my 65L pack. I would recommend this for cold weather camping, but not for backpacking or anyone who is trying to gravitate towards having a lighter gear load.

Warm but bulky

  • Familiarity: I've used it several times

This bag kept me warm in 20 degree (F) weather where it was also very windy. It feels good to the touch, seems to be built with quality in mind, and is comfortable and lofty. The only caveat; this is more of a car-camping bag. It compresses to the size of an over-inflated basketball and takes up a lot of real estate in my 65L pack. I would recommend this for cold weather camping, but not for backpacking or anyone who is trying to gravitate towards having a lighter gear load.

Warm bag. Great insulation at feet.

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

Took this bag down to Moab in late November. We reached degrees in the teens and this bag kept me toasty without having it zipped up to my chin. I like the draft flap on the inside of the bag. I also enjoyed the zipper on the front going down the chest as opposed to a side zip which I can sometimes feel as a heavy side sleeper. My only con about the bag was the half-zip. It made it a little difficult to get in and out compared to a full-zip.

Waaaarrrmmmm!

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

This bag was warm and definitely kept me toasty all night. I only gave it 4 stars because I have used other 0-degree bags that are more comfortable, easier to get in and out of and don't have weird velcro that sits right at your face. For the price this one is hard to beat.

Pretty Impressed

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

Truth be told I only borrowed this so I wouldn't have to bring my good zero degree down bag to the desert where it would get all sandy. That said, this bag ended up genuinely impressing me. When I first crawled into the bag the temperature was probably just under 50 degrees and dropping quickly. I instantly found the bag to be warmer than I expected. At first, I thought this was going to be a problem because the center zip meant that unzipping to get some venting going let cold air directly on to my chest instead of letting some of the hot air out. However, I found that with a little shimmying I was able to get the zip off to the side which made for more effective venting while still leaving open space for my face to breath fresh air. The temperatures ended up dropping down to near freezing that night but I slept soundly through the night, and never even ended up bringing the zipper all the way up.

In terms of comfort, the bag did very well with a very nice face fabric and plenty of room. I'm 5'10" and found the length to be perfect.

The only real downside that I noticed was that it's a synthetic bag which means that it could be lighter and it could be more compressible. I was car camping for this trip so it didn't matter too much but if I were looking for a bag that I needed to get into a backpack I'd want down. True down has the downside of being useless when wet but most good down bags have some sort of water resistance to them now and I've never had a problem with it.

Overall if you're looking for a very warm bag and are worried about getting it wet it would be hard to find a better choice than this. If you're not so concerned about moisture, find a good down bag.

If you have any further questions you can ask me directly at
jeallen@backcountry.com

So Cozy!

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

This sleeping bag is the warmest 0 degree synthetic I've been in! It was also huge, with a ton of room around the waist especially. This would be great for someone who likes to have more mobility. I am 130lbs so it was quite spacious. I used it on a cool night that probably got down to 45-50 degrees, and it was plenty warm. I like that the zipper has two ends, so can be unzipped from the bottom as well for some venting.



This is a synthetic bag, so will not pack down as well as the equivalent down bag. But for car camping, this would be great!

So Cozy!

This baby is a beast!

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

This is easily the warmest synthetic bag that I've ever used. While this may not be the ultimate lightweight minimalist bag, this baby will never leave you cold, and the amount of loft that thermal Q insulation yields is pretty unbelievable. It's very similar to a down fill, but not quite as light or compressible. However, it's so soft you could almost use it without a sleeping pad. I was also very pleased with the width around the torso and the 'comfort box' in the foot area. I find that some mummy bags can be claustrophobic and restricting, but I didn't experience that at all with this bag. I was able to use it on a cool summer night in the wasatch(which may have gotten down to 50), which still was well above it's suggested rating. But it is very clear that this would suffice on nights when temperature falls into the single digits.

Great for car camping and very warm

    I took this bag up to the base camp for the Exum route on The Grand in the Tetons's and this plus is this is the warmest I have ever been in a sleeping bag. While I am extremely pleased with the warmth of the bag, it is heavy and doesn't stuff down that small. I suppose all the materials that make this bag warm increases weight and overall size. In my opinion, this bag is great for car camping and/or shorter/easier hikes, but not great for a seven mile hike with a ton of elevation gain.

    I truly love this bag

    • Familiarity: I've used it several times

    This is an exceptionally innovative bag, which is something one has come to expect from Mountain Hardwear. It is of course a part of the Lamina series of bags, where the seams are welded rather than stitched in an effort to avoid pinched insulation and the cold spots that result. Thermal. Q insulation is a hybridized down and synthetic blend which offers additional weather resistance. Despite the slim fit I and my 6 foot 200 pound frame fits comfortably inside, and the toe box allows ample room for ones feet. The centered half length zipper is amazing both from the perspective of weight savings as well as functionality. The draft collar is a brilliant feature that traps warmth and limits build up of condensation from ones breath. It has proven comfortable in wind, damp and cold.

    Thermal Q isn't a down synthetic hybrid. It's a synthetic that mimics the structure of down while Q shield down is mountain hardwear's down with a DWR coating.

    Did you get the long length?

    Why isn't there a lady specific bag?

    • Familiarity: I've used it several times

    When I got the call that I had a package at my company's warehouse I was thrilled. My new, state of the art, zero degree bag was in! I didn't buy this bag for the color, or the looks, that is for sure. I was hoping that it would keep me toasty warm on my first winter camping trip. Consensus: this bag is great, but could be better if you are a lady, or not a broad shouldered man.



    However, here's the deal, if you are lady who is thinking about purchasing this bag I would reconsider. Here's why:

    As you can tell from my photo, this bag swallows me. Which means, that when I am sleeping there is a lot of dead air space. Hence, if I wanted to get the advertised effectiveness out of the bag, I would need to stuff all the clothes I brought on my trip into my bag and then some more. While this may not seem like a problem for some, it seems like a waste of this bag's potential. You do not get the full use out of your bag! You sleep colder as a consequence.



    BTW, I bought the regular size since I am 5'8" which adds to the "too big" problem.



    Please MH, make a lightweight lady specific synthetic bag!

    Why isn't there a lady specific bag?

    Lamina Construction

    Learn about construction of this bag and what makes product unique.

    Just a heads up when ordering, The "size" option dropdown shows Left Zip, but this is actually a Center Zip like the picture shows.