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Serious warmth at a silly price.

Packing a hefty dose of warmth for the price, the Marmot Trestles 0-Degree Spirafil Sleeping Bag boasts technical features such as SpiraFil insulation, an insulated hood, and an overlapping series of internal shingles for blissful warmth retention.

  • DWR-coated shell material fends off light rain and moisture so your bag and insulation stay drier in inclement weather
  • Lofty SpiraFil insulation combines hollow fibers and denser, solid synthetic fibers in order to offer a balance of warmth, softness, and compressibility
  • Insulation fibers are thermally bonded so the insulation maintains its loft and shape longer, meaning more warmth and a better-performing bag in the long run
  • An overlapping series of internal insulation shingles creates the Wave Construction, which allows for more efficient use of insulation so you stay warmer without needing additional insulation that would add weight
  • Easy-to-reach draw cords make adjustments easy when you're bundled up
  • Trapezoidal foot box matches the shape of your feet: wider in the toe area and narrower in the heel so you have more foot room and warmer feet
  • Zipper garages cover up the two-way sliders from the elements so they operate smoothly every time

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Here's what others have to say...


Weighted warmth...

  • Familiarity:I've used it several times

Ok, the only reason I wouldn't give this bag a fifth star is that it weighs a ton. This is not the sleep sack to put in your back pack. It is the perfect sleeping bag for Camping in the snow or in the back of your truck on a "ski bumb" vacation. The bag has all the bells and whistles minus the 800 down. This bag is sold at a more than fair price, crazy not to have this bag in your outdoor arsenal.


Toasty in the cold

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

I loved this bag. It was comfortable, easy to use, packs well, and very warm. I used it in close to freezing weather, and I was very, very comfortable with a set of fairly thin long underwear and a hat. Shockingly, I had to take my socks off because my feet got too warm, and I even sleep with socks in my own bed at home in the winter. I expect that it would remain comfortable well down into the teens (Fahrenheit), not sure about the single digits. People complain about the bulk. It is kind of bulky, but if you want to go very small you have to pay two or three times as much. I was happy with a bit of bulk (it is less bulky than many others) and the lower price tag.


Good Bag

  • Familiarity:I've used it several times

Good bag for the money. Wouldn't recommend for backpacking or hardcore campers as bag is relatively large and heavy. I haven't had the chance to use it in the sub 20 range, but I used it this summer/fall and it kept me warm and comfortable during multiple excursions.

Pros: Warmth at a good price
Nice looking bag. Really enjoyed the Malaia Gold/Flint color.
Roomy for a mummy bag. I've had problems before in the room part, but this one did well.
Loved the the half zipper on the other side. I could hop into the sleeping bag from either side. Very nice.

Cons: I didn't like how the zipper sometimes catches
Relatively large and heavy (Not much to complain about at this price range though. Just wouldn't use this if I was into hardcore hiking)

Overall for someone looking for a good bag in this price range, go for it!

i hear the biggest complaint is the weight and stuff sack. I don't care so much about the weight but i want to make sure it will fit in my pack and not take up all the room... Does it come with a sack that can be cinched tighter or is there a stuff sack you reccommend that will fit this bag?

The sack that comes with this does not really do an extra cinch. There are plenty of different compression sacks out there. I think the best way to pack this bag is put in some heavy stuff then stuff the sleeping bag around it, it will take up any dead space and still compress down pretty well. Then put stuff on top of it. Good luck!

your trestles o degree synthetic dark rust long x wide is 62 in but the regular is the same also the length why ????

Best Answer

Richard, sorry for the site being off. We will get our specs updated. Here is the info you need:

So the Long version fits up to 78" versus the regular which is 72".

The long version in terms of width is 64" for shoulder girth and 60" for hip. The regular is 62" in the shoulder and 58" in hip.

The wide version is 70" in shoulder girth and 66" in the hip.

If you have anymore questions feel free to send me an email or call!

Bill Porreca



Warm, durable but bulky

    This is a good synthetic bag, as far as synthetics go. It is really warm when all draw strings done up however I only use it for base camp or short guiding trips as it is just to bulky for serious missions - thus the problem with synthetics... still , if synthetic and spring are your thing and you can take the bulk, its a good one :)


    Really warm bag

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

    I researched a lot and had a good experience with the backcountry staff to pick out a solid bag for winter camping. We took ours out this past weekend (Dec - 27th) to Wisconsin, and the weather was snowy and really frigid. The bag was cozy and warm in our tent (which really isn't winter friendly). I found the bags to be surprisingly pack-able, contrary to some of the reviews. It is a little large for backpacking but totally capable of it. Overall, really warm bag for the $.

    Side note, Who has a recommendation for a better stuff sack that'll fit? the Marmot one has trouble closing at the top.


    Best Bag I've Ever Used...Ever!!!!!

      I ordered this bag at around 3:30 PM on Thursday, August 28, 2014. I received this bag at around 10 AM on Friday after selecting next day air. Sarah O. did and amazing job walking me through everything in the process and waaay exceeded my expectations as far as customer service is concerned. But I digress, I bought this bag to use backpacking the Cloud Peak Wilderness Area in Wyoming. If you are at all familiar with Wyoming weather you know that snow in August is just as normal as snow on Christmas. We hiked in Saturday evening and made camp after getting soaked in the river crossing. I have never been so comfortable in a sleeping bag in my life. I get cold really easy and this bag actually kept me warm enough to pop my arms out for a bit. That was just the beginning of the Awesome-ness of this bag. The next day it rained all day and when we made camp at Misty Moon Lake it started to hail, and then snow. That night it got to a frigid 23 degrees F and the wind and snow would not let up. This bag kept me warm all night. It packs down perfectly and the features it boasts are not short of perfect. (On a side note, I am Type 1 Diabetic and it managed to keep my insulin from freezing as well) In short this bag was not only comfortable, packable, and warm but it very well saved my life. I couldn't be more happy with this bag, or with Backcountry and with Sarah O. This is the best purchase I have ever made.

      Woot! I'm glad you love it, Maggie.

      Thanks for your loyalty and we appreciate the feedback!


      Great bag, great warmth. Bulky.

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

      This bag excels at keeping me warm, and fits true to my body. I have a slim to athletic build and I have space to turn in the bag. If I had much bigger shoulders, I could see it being a potential problem.

      The bag is bulky, and the Marmot stuff sack it came with barely fits the bag inside. With that combination, once the sleeping bag is in the stuff sack, it doesn't compress much. However, I think it would compress A LOT more if the stuff sack were a little wider. Something to think about.

      With the the included sack, probably not a great sleeping bag for backpacking, but an excellent choice if you're not having to travel far with it. And as I said above, if you had a larger stuff sack it would probably compress quite a bit more.

      Overall, I'm very happy with the bag and look forward to a lot of cozy nights in the Cascade Mountains thanks to this bag.


      Bulky, but Warm

      • Familiarity:I've used it several times

      As many have said before, this bag is a little heavy/bulky for backpacking; but, it does fit into the compression sack pretty well and compresses well enough to fit sideways in the bottom of my 75L REI pack. It is very warm- I camped in sub-freezing temps with a high fever with no problem. Great price, too. I just wish it was a little less bulky and heavy.


      Heavy for backpacking, but super warm

      • Familiarity:I've used it several times

      Great sleeping bag if you're looking for something warm and not too worried about space or weight.

      Used it in Gila National Forest, NM (car camping) and Pikes Peak, CO (backpacking) with temperatures between 10 and 25 degrees at night, and with a few layers on was sweating.

      Bag seems very durable and warm after about 20+ nights of use. While it is large and heavy it worked well when hiking up Pikes Peak.

      It's best uses seem to be car camping and for that it's perfect. If you're looking to backpack you probably want to find something lighter.

      Stuffs well into a Medium Sea to Summit eVent Compression Dry Sack

      5 star rating for car camping, loses a couple stars if you're taking it backpacking though.

      So the medium (15 liter) Sea to Summit Dry Sack is big enough to fit the Marmot Trestles 0 in? How much does it compress? Any info you can offer would be greatly appreciated! Thanks!


      Bad for backpacking

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

      Took this to the bottom of the Grand Canyon. Nice bag but does not compress to fit in backpack. If you plan on sleeping outside 100 meters of your car purchase something smaller.


      Toasty bag in 17 degrees Fahrenheit

      • Familiarity:I've used it several times

      We car camped through the southwest Dec 2013-Jan 2014. The coldest was Arches Natl Park. The lowest temp was expected to be 19F the first night and 17F the next. We were completely warm and comfortable. I was actually sweating the first night, so I only wore leggings, shirt, socks and sweater the second night.

      We were in a 3 season backpacking tent that was covered in frost each morning. We laid jeans and a jacket between our tent and the self inflating sleeping pads, which were R value 4, and it did the job of insulating us from the cold ground. The area our tent was on was cleared of snow.

      My feet were a little cozier with my wool coat thrown over them. We did use the mummy hoods for this site, but we were not completely zipped up and buttoned in and I was alternating having my face tucked into the bag, as I would get too hot. I really like the extra zipper on the opposite side of the shoulder, as well as the extra piece of nylon with interior snap buttons to really seal your body heat in.

      I have broad shoulders for my build, 5'2" female, but I have plenty of room in the bag. I did get a regular instead of a short bag so we could combine it with my bf's long bag. He's 6'4" and also had plenty of room in the bag. We combined bags in temps as low as mid-20s in Zion Nat'l Park and slept with the fly off and we were fine. These bags are great!

      There's a stash pocket on the inside layer that lands about chest height. This was good for contacts cases and phones so they don't freeze. If you're getting bags to combine, don't forget to get zippers on opposite sides since they're mummy bags and are not reversible.

      I'm not an experienced backpacker, but these would not make good spring-fall backpacking bags because they are thick and do not pack small. Packing them is probably my only complaint. It's easiest for me to start from the bottom of the bags and stuff them into the bag without trying to roll the bag up.

      Survived the washer and dryer as well!


      excellent bag, but not for backpacking

      • Gender:Female
      • Familiarity:I returned this product before using it

      Despite reading the reviews on this bag packing too large and too heavy for backpacking, I took a chance on it anyway because I trust Marmot products and I thought I would be able to compress it to a decent size. After all, camping in Alaska I'll generally value warmth over weight and I got this for a good price. However when I got this bag it was simply too big and heavy. Even when I compressed it as small as possible (which was no easy feat and I was afraid the stuff sack would tear!) it would just barely fit into the bottom of my golite pack, which is wider than most framed packs. (not to mention I normally don't pack a bag in the bottom - I have no efficient way to pack my backpack with this in it.) It simply takes up too much room and is too difficult to pack, so I'm returning it. I really hate to see it go because it's an excellent bag with great loft and I'm confident I'd be comfortably warm down to 0, if not colder. If packability is not an issue, this is a great bag. 5 stars for quality, though if I was keeping it I would buy a better stuff sack.


      Car Camping Luxury!

      • Familiarity:I've put it through the wringer

      After owning the Marmot Trestles 0 degree bag for 4 years I can say with certainty that it is my bag of choice for car/tent camping when the temps are expected to dip below freezing. At 5lbs 4.7 oz it is a bigger bag but if you're close to your car, or in your car that isn't a problem. I've used it in my car, down to 20 degrees in the mount hood parking lot as well as tent camping in mammoth lakes when the temps dipped below freezing and never got cold. At 6'0 tall the regular length has worked fantastic for me. It's condition shows no signs of wearing out anytime soon! Coming in just below $150 dollars, this bag will rival those twice the price in terms of durability, warmth, and comfort.

      Does this thing have velcro/rip-and-stick...

      Does this thing have velcro/rip-and-stick around the face/head area? I despise velcro.

      Best Answer

      This has an insulated collar with easy access cord - Engineered to close without Velcro.


      Impossible to stuff into the sack

        Bag is soft & warm. However, the bag is impossible to fit into the sack. Spent an hour trying to stuff it into the bag, the best I could do was with the hood sticking out. Any help? ?? Not great for transporting around even in a car.

        I completely understand! It's a really tight fit. I usually have to sit on the top and use the compression straps and cinch cord simultaneously.

        It does to stuff to about 28 liters, however, so unless you really don't have room, I'd say it's ok for car camping.

        Another option I've used to get to ~21 liters is the sea to summit event dry compression sack.

        For me, the bag fits perfectly in the compression sack. I cinch the straps down after the flap is down and the cord is tight and I manage to get the bag sideways in the bottom of my REI 75L (yosimite?) pack without a problem. I almost got it to fit inside an Outdoor Research 10L waterproof compression sack- probably needs to be 12-15L.


        Warm and comfortable

          Great bag! Kinda wished I had bought a down bag, but I will keep this for sure! Used it in Yosemite and loved it. Perfect bag unless you are backpacking. Doesn't compress quite enough.


          Im Satisfied.

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

          I tried this bag for the first time in a winter trip to the bwca in January. Im satisfied with it. Its rated for 0 degrees-it was probably about 8F during the night, and although it took about an hour for me to warm up to a comfortable temperature in the bag, eventually I did-and had a good night's rest. I was sleeping in a homemade snow cave rather than a tent-so this may have raised the temperature around me too.

          homemade snow cave as opposed to... Mass-produced snow cave? :p I kid