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After two seasons in the hands of customers and outdoor enthusiasts, the popular Stoic Somnus down sleeping bag returns with a new, redesigned zipper opening. The Somnus SZ 15 Sleeping Bag features a side-zip opening that now runs the entire length of the bag, from the hood opening down to just above the toe box. Now that it's even easier for campers to climb in and out of this bag (the previous seasons' front opening was designed for climbers), you'll have more time to notice the finer touches like the Pertex shell that keeps pack weight low and the 850-fill goose down that provides ultimate warmth in cold weather.

  • Redesigned main zipper is now located on the side of the bag to give this a more traditional opening that's easier for campers to climb in and out of
  • Longer main zipper runs to within 16 inches of the base of the foot box, almost the full length of the bag
  • 850-fill down insulation provides supreme warmth without weighing down your bag and is highly compressible to make packing a cinch
  • Pertex shell material creates a durable outer shell without a nasty weight penalty
  • Vertical baffles ensure that the down insulation stays put even if you sleep on your side
  • Draft tubes prevent chilly air from entering around the neck so your heat stays inside your bag
  • Zippered pocket at the footbox holds a hot water bottle to keep your toes toasty on frigid nights
  • Reviews
  • Q & A

What do you think about this product?

Have questions about this product?

I love it

  • Familiarity: I've used it several times

I used this bag on an overnight adventure in the Australian winter. I was camping in a hammock with no other insulation but this bag and it was a very windy night. I was really cold when I hopped in and was praying that the bag was going to be as good as I hoped. It took a little while for me to warm up as I was very cold. The next thing I knew I woke up sweating and had to undo the bag to cool off. I got a wonderful nights sleep despite the very cold and windy conditions. I love this bag and the waterproof stuff sack is great. I even got up to watch the sun rise and sat with my bag directly on some sharp rocks (not a terribly smart idea) but the bag held up well with no signs of pulled threads or tears.

Great Bag, but not perfect

  • Familiarity: I returned this product before using it

I am 6.2 ordered the long and it is needed. The bag runs little tighter than the marmot pinnacle. I kept the marmot even though it was not water proof. They have the same rating.

Goods: waterproof, very soft pertex material outside and inside is really lovely. Very comfortable better than the marmot. Great colors. Best zipper design I have seen, it never snags. Tight fit so it is warm because it wraps you around.

Bad: no insulation around the neck and shoulder. You can tighten the neck with one adjustment loop, but as you move cold air can get in. The marmot has twice the insulation there and two adjusting loops one above the neck to seal any cold air entering below and one around your noes to really wrap your head around. Plus enough room to fit a pillow in the hood. The stoic is lacking these features and the hood is probably not quite as warm and so I returned it. The bag felt smaller the marmot too once opened for a whole day so it may have less fill too.

Light and fluffy

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

Have only used for 2 nights backcountry, but initially im impressed.

Its REALLY light and easy to pack.

Its REALLY warm. Maybe too warm for my personal needs, may have to get a second bag for summer months. I bought the 15.

The stuff sack it comes with kind of blows. Its cheap, and the bag can clearly be compressed further than the sack allows.

I have zero complaints so far! For the price its a great buy, especially if you are looking to cut down weight on the longer trecks.

Stoic Somnus SZ 15 Sleeping

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

After lugging around a synthetic sleeping bag around for a few years, a friend let me burrow his down sleeping bag and I absolutely loved it. So I bought my first down sleeping bag: the Stoic Somnus SZ 15. I was excited and proud of my purchase until..... I tried it out and ughhhh, the smell was literally foul!!!

I can not live with the smell of that bag. Here is how it happened: Went on the AT in Northern GA, slept in it the first night got up early the next morning put in the stuff sack hiked all day and when I took it out to bed down the smell hit me like freight train... it was awful. I lived with it for another night, barely.

I called Backcountry as soon as I got back, explained the smell and they told me that the reason it smelled was because it was duck down as opposed to goose down. That if I aired it out the smell would go away... I did just that and they were right, the smell did go away. But it will come back if there is enough moisture [fog] in the air. Mind you, the bag did not leave the tent. It wasn't like it was exposed to the elements.

Customer service was ok, they were willing to take it back but will not refund my money!!! They will instead give me store credit. It is not my preference but at least I don't have to live with that awful smell.

Buyer beware. Apparently you have to ask if the down is duck or goose. And if you buy from Backcountry and you need to return you have to know that you will not get your money back.

Seems like a great bag

    It is light and warm.Haven't taken it out yet. The price is great. I bought this bag at $261. 2 weeks later it was on sale 60% off. I contacted Backcountry and they price adjusted!!! Great customer service!!! I will be shopping here for sure!!!

    Bomber bag, bomber price

      The Somnus 15 is a great bag. The material is very soft, yet durable, and is very light. The down is an 850 fill, meaning you're getting a light bag without compromising warmth. The zipper on this is great and has never snagged on me. This bag runs a little long. I'm 6'1"and ordered the long. I probably would have been fine with the regular. That being said, I don't mind the longer bag. The only thing I wish this bag had was a stash pocket near the top. I've just gotten used to those with my other bags. Down is the way to go and if you can snag this bag on SAC or on sale here, do it! You won't regret it.

      Love Stoic!

      • Familiarity: I returned this product before using it

      Love this bag! I was checking out this bag and was a big fan! The only thing I didn't like was that I couldn't really move in it. I am a bigger dude. 6 foot about 295. I passed on this bag, but the craftsmanship is superb! The stats do not list the packability-- It will stuff to 8.5"x12.5"

      Great bag!

      • Familiarity: I've used it several times

      I'm in Alaska an I've had the bag for awhile now. Its a great bag for backing. It packs small, not heavy at all an keeps me warm. I sleep in a hammock in the summer time, when I do this with this bag I don't need to put my sleeping pad it the hammock. This bag works just fine. I got it at the end of last winter an was only able to use it once in the snow, but it kept me warm. My feet even stayed warm because of how tight the bag is.

      Great bag so far

      • Familiarity: I've used it several times

      Have used twice and it's been a fantastic bag so far. Once in the San Gabriels and the other at the Mt. Whitney portal. Compresses really small and is very warm. I wish the zipper was on the opposite side though as my bivy opens from the left and this opens from the right. Really great bag and the compartment to stuff a shirt in to make it into a pillow is really cool. I have yet to use the zippered pocket at the footbox but will use if ever needed.

      Great Sleeping bag

        I recently replaced two stoic vamp sleeping bags with 2 of these and I must say I am very glad I did. I have found them to be very warm and light. The zippers are almost impossible to snag and a huge improvement over the Vamp which would snag every time. The down seems to be distributed exceptionally well as I was unable to find any areas without down or any cold spots. The regular weighs exactly 2 pounds without a stuff sack and the stuff sack weighs another 3-4 ounces. The regular fits me perfectly even though I am 6ft 2. If you are under 6ft 3 don't purchase a long buy a regular. I made that mistake once and I was very displeased with my decision and those who had told me to get a long. Anyway love the sleeping bag and I highly recommend it


          Mine just arrived today. It was between this bag, a Feathered Friends option ($365) and the GoLite Z10 ($349) and I chose to save $150. Am I ever happy I made this decision. There's no way that those bags are worth nearly twice the price of this bag.

          Here are the weights:

          Bag alone: 34.3 oz

          Down weight: 19 oz

          Stuff sack alone: 4.7 oz

          Total weight: 39 oz

          Stuff sack dimensions: 17x9 (uncompressed bag in it), 12x10 (bag compressed)

          I'll have to agree with the other posters that I'm not overly thrilled with the quality of the stuff sack. I'll upgrade it more than likely. Other than that everything about this bag is a win. I can't wait to give it a try! If it performs as advertised I'll upgrade this to 5 stars.

          Solid Bag for the Money

            I finally had the opportunity to try this bag out a couple of weeks ago and feel it is a solid bag for the $. The bag is very light and compressible and while not getting close to its stated temperature rating kept me very comfortable in temperatures in the 40's. I do agree with another reviewer that the description stating it has a neck baffle is misleading as it does not. However, the hood works really well and cinches tight and I really enjoyed the built in pocket that you can stuff a shirt or jacket in to use as a pillow. The drawcord on the hood was not great and I'm a little surprised that a more conventional device wasn't used - the stiff cord hangs in your face if you're not careful. The stuff sack is not very good and will need to be replaced if you want to reduce weight and get full compression of your bag. Overall I rate this bag as really good and at the price I paid you can't beat it for an 850 fill goose down bag. I would definitely purchase again but wish stoic would put a few extra $ into the product and upgrade the cinch on the hood and the stuff sack.

            good but could be better

              the bag is warm, light, and well made. The backcountry description infers this bag has a neck baffle or collar but it does not. I don't believe any other premium manufacturer is making a 15 degree down bag without a neck baffle..This really surprised me when I saw it did not have one.. The backcountry description is misleading.. other than this one issue, the bag is very nice for the money.. well worth the price.

              Super Buy!

                This bag is a hidden gem of a find! Check out the specs. 850fill goose down-not duck down,insotect baffle tech, pertex quantum fabric,good mummy cut-roomy up top in case I need to layer, light weight. You prob can't find a comparable bag unless ya spend upper $300-400 range easy. I live in Pacific NW... Play in the Sierras...I'm a lightweight backpacker-30plus yrs. backpacking/outdoor experience.It's plenty warm-so far it's been great- used it into mid 20's with lightweight base layer & thermarest foam pad.So nice -I actually bought 2 more. One for an extra & one for a friend. Well worth the investment.

                Very nice bag

                  Terrific bag. Pertex shell is lightweight but very tough. Very warm - on a 20F degree night, I was quite comfortable with just wearing my base layer. The next night, we were 4000 ft higher and it was -1F - with base layer on top and bottom, plus mid layers, I managed thru that night - still a little cold but manageable. The only cons the comes to mind - the stuff sack is heavy and not at the same level of quality as the bag. I'll be searching for lighter replacement sack for this bag. The shock cord that circles the face area to open or close it is a little thick and in-elegant - the cord tends to dangle on one's face during the night. Given how well the rest of the bag is made and designed, I'm surprised this detail lacks the same level of detail and attention.

                  albp28922 -

                  I just received mine & completely agree with your assessment of the compression stuff sack and the hood cinch cord. Really odd how janky these two items are given the overall quality/value of this bag.

                  To remedy the hood cinch, I simply pulled the the stiff elastic cord out & replaced it with the flat drawcord from the cotton storage bag. Works great!

                  Note to Stoic: Shave a couple bucks off the price of the bag by eliminating the heavy, overbuilt compression sack. Most users either won't use it (due to it being too heavy), already have one, or would be willing to buy their own ultralight model.

                  I'll post a review as soon as I get this thing out on the trail.

                  What are the shoulder/hip/foot box...

                  What are the shoulder/hip/foot box measurements for the regular bag please?

                  Does it come with left and right zippers?...

                  Does it come with left and right zippers? I am thinking of buying two for my girlfriend and I, and I was thinking if I could zip them together.

                  Thank you for answer to question about...

                  Thank you for answer to question about weight of the Stoic Somnus SZ 15. Next question: To what does the 15 deg F refer? Is it the "upper limit", "comfort rating", "lower limit" or "extreme". I need warmth.


                  Best Answer

                  A sleeping bag's temperature rating identifies the lowest temperature at which a bag is intended to keep the average sleeper warm. When a bag is described as a "20 degree bag," it means that most users should remain comfortable if the air temperature drops no lower than 20F. These ratings assume that the sleeper is wearing a layer of long underwear and using a sleeping pad under the bag.

                  People and sleeping bag temperature ratings vary from one manufacturer to the next. So use these ratings as a guide, not a guarantee.

                  Here's a general rule of thumb on temperature ratings:

                  Bag Type: Temperature Rating (F)

                  Summer Season: +35 and higher

                  3-Season Bag: +10 to +35

                  Cold Weather: -10 to +10

                  Winter/Extreme: -10 and lower

                  Hope this helps!

                  What is the weight (lbs oz) of the Stoic...

                  What is the weight (lbs oz) of the Stoic Somnus SZ 15, including its stuff sack if possible?


                  When you are not using the Stoic Somnus...

                  When you are not using the Stoic Somnus SZ 15 Degree Down sleeping bag how should it be stored for long periods of time?

                  Best Answer

                  The storage sack will allow it to expand and keep the down intact. If you store it for long periods of time in the stuff sack, it'll compress the insulation and over long durations will cause it to break down. I have a Stoic bag from 3 years ago and still is in great shape. I will use a compression sack when I'm backpacking however after I'm done, I air it out and store it the large cotton sack. Works very well for me because I don't have the space to store my sleeping bags hanging upside down, which is really the most ideal.

                  Would it be reasonable to fit a long into...

                  Would it be reasonable to fit a long into a 10L stuff sack?

                  You could do it, but it's not going to be particularly reasonable or easy. 10L is usually a small in most comp sacks, A medium (14-ish liters) is a better choice because it saves you a lot of effort when you pack and repeatedly over compressing is really hard on the down itself.

                  Is the down used in this sleeping bag...

                  Is the down used in this sleeping bag collected from birds in a humane way?

                  Down collected in China is almost always taken during the food slaughter process. The birds are being killed anyway, and your views on that are up to you. Not all down is collected from dead birds or even plucked from their chests while they're alive. Older birds produce more and higher quality down, but younger birds are the ones they kill for food. Some companies use only down collected from nests during the molting process, but that's going to be the higher-line manufacturers (they make a huge point of saying it in their PR), but you're going to pay dearly for the more expensive methods they use.

                  I think that just somehow knowing that their feathers are going to provide you with a warm and comfortable sleeping bag is enough for them. Here's a picture of Chinese geese doing their morning Tai's all very zen. Notice how there's not a disgustingly large amount of crap on the ground? No crap everywhere= happy geese

                  I think that just somehow knowing that their feathers are going to provide you with a warm and comfortable sleeping bag is enough for them. Here's a picture of Chinese geese doing their morning Tai's all very zen. Notice how there's not a  disgustingly large amount of crap on the ground?  No crap everywhere= happy geese

                  How much does it weigh?

                  How much does it weigh?

                  Best Answer

                  Here is Eric bcskier's response from comments below:

                  "Did a live chat, and was told that it has 21oz of down fill, and a total weight of about 34oz (2lb 2oz). That's about 1 ounces heavier than last year's design, but the additional weight is just in down fill (last year's design only had 19oz of fill), so it should (hopefully) be warmer."

                  What are the shoulder/hip/leg girths for...

                  What are the shoulder/hip/leg girths for both Regular & Long lengths? And are these available only in Right-zipped version, as pictured?

                  Hi I wonder is there difference in quantity...

                  Hi I wonder is there difference in quantity of filling down the top and bottom of the sleeping bag

                  Just wondering what the stuff size is for...

                  Just wondering what the stuff size is for this bag (both Regular and Long) since it doesn't seem to be listed ANYWHERE. Thanks!

                  What I'm wondering about this bag is, is...

                  What I'm wondering about this bag is, is there a draw string for around the shoulders? Thanks, Jared

                  How much does the sleeping bag weigh? And...

                  How much does the sleeping bag weigh? And how much of the weight is down? I believe the old Somnus weighed 33 ounces, with 18 ounces of down fill.

                  Also, I lament the move away from a center-zip bag

                  Something's not right about this listing. The pictures look more like the Vamp 30. Even the Stoic website confirms this. There doesn't appear to be any change to the center zipper on the Somnus at all.


                  Did a live chat, and was told that it has 21oz of down fill, and a total weight of about 34oz (2lb 2oz). That's about 1 ounces heavier than last year's design, but the additional weight is just in down fill (last year's design only had 19oz of fill), so it should (hopefully) be warmer.