Free 2-Day Shipping on Orders Over $50* Up to 25% Off Marmot– Save on Clothing and Gear


Stay warm and stay rich.

Simultaneously avoid frostbite and credit agencies with the Alps Mountaineering Crescent lake 20 Degree Sleeping Bag. Alps keeps the price low and the versatility high with Techloft+ insulation, a synthetic alternative to down that maintains more than 70% of its insulating properties when wet. Offset baffles eliminate cold spots caused by seams, and the mummy shape and contoured hood keep the insulation close to the body to trap heat efficiently.

Share your thoughts



No file chosen

Rather attach a photo from another website?

Rather attach a photo from your computer?

    Add a:
  • Share a photo
  • Share a video


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

Now review from the App.Download

Here's what others have to say...

What are the WIDE size dimensions?


Here are the specs on the wide:


36" x 84"

Fill Weight:

44 oz.

Total Weight:

4 lb. 6 oz.

Shoot me an email anytime you have questions!

Jared D.

Expert Gearhead



Perfect for Car Camping

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

We took it on a car camping trip. It packs well and smaller than I thought, based on some other reviews here (although it is still suited for car camping). The night temperature was in the low 50s, so I slept with the bag open. It was comfortable. Looking forward to testing it in lower temps.


True to Description

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

I'm 6'2" and this sleeping bag is the perfect size. Snug for warmth and not too tight. It's large for hiking but breaks down nicely to pack away for car camping. I haven't put it to the "cold night" (under 45 degrees) test yet.

This bag comes with a stuff sack. Does it also come with a storage bag?

The stuff sack is basically the storage bag. Technically when your not in season you should store your sleeping bag hanging up to protect the insulation.

You might be thinking of the compression sack, which minimizes the size of the sleeping bag in your pack. That item is sold separately.


Great for car camping

  • Familiarity:I've used it several times

This is a great bag for car camping and comes with a tough and sturdy stuff sack for storage. I used it in the desert in early spring in southern Nevada and it definitely kept me warm for 45 degree nights. I wouldn't recommend this for backpacking as it is pretty bulky/heavy.


Decent for the price

  • Familiarity:I've used it several times

I picked one of these up to have as a spare when friends come to visit. The bag is great for car camping or when packability/weight are not a huge issue. It shouldn't come as a huge surprise that this bag is on the heavier/bulkier end of things. You can backpack with it in a pinch, but it's going to take up a good bit of real estate in your pack. I have the regular size - it's quite generous in the chest/shoulders and fits me (albeit snugly) at 6'1". The 20 degree rating is maybe a little optimistic - this bag kept my friend comfy enough at around 30 degrees a couple nights ago but she said that was about the limit of how cold it would be good for.

Durability seems good so far and the fabric is pretty rugged. Zippers work well and don't have huge issues with catching the fabric and jamming. I expect this bag to take abuse in stride.

Overall, a good choice if you're looking for a spare to have around the house or a first bag for car camping on a budget. If you're looking to get a sleeping bag for backpacking, I would recommend trading up a bit in price for big improvements in weight and packability.


Warm and comfy

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

Have used it for car camping and so far so good. Keeps you warm and is comfortable. Doesn't pack super small in the sack.


Perfect for car camping, not backpacking

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

It is really comfortable and soft, but a little bulky and heavy. I would not recommend it if you do backpacking.

I saw that this bag's zipper goes all the way down to the bottom. Does this bag mate? Can it be joined together?

Best Answer

You can join them together but, they are not meant to be joined. Since they are mummy in shape, it wont be a perfect fit by any means the feet will stick out.

Feel free to hit me up at or 801-736-6398.


Solid Bag - perfect length

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

I finally bought a sleeping bag! I absolutely love it and have only tried it once. The weather got down to about 40 degrees at night and I was completely content warmth wise. I am very impressed with the overall quality of the bag as well as the more specific things like the zipper and shape.

In terms of weight for a synthetic bag - I believe it is a great weight. Not too heavy so it is nice to attach to the bottom of your backpacking bag. You barely notice it is there. The stuff sack that is provided is of great quality and it is really easy to get the bag back in the stuff sack which is key in my mind.

Conclusion: solid bag from ALPS Mountaineering - first piece of equipment I have bought from them and I am completely 100% satisfied. Note: This also has a 0 degree option if you are looking to go camping in colder weather.

Solid Bag - perfect length

Cant go wrong

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

So far this bag is everything I've wanted it to be. It retains an amazing amount of heat. I'm not super tall 5'9" but i do have a wide stocky upper build. Yet with this bag I'm able to turn from side to side without getting all twisted up in it. In fact at around 70lbs. If I lay on my side even My service dog can fit in and we both stay quit warm on those nights were the temp just drops.

For now I'll gladly give this sleeping bag a 4 star till I get in some further testing this October. Cant wait! Thank you Backcountry. You guys/gals have become my go to for outdoor sports and gear. the only bad thing is this comes with pretty much a basic bag. Its NOT a stuff sack. NO STRAPS AT ALL.

Cant go wrong

Great bag... all things considered

  • Familiarity:I've put it through the wringer

Purchased this bag knowing full well that synthetic fill bags don't compress very small. Planned on using it with an external frame Kelty pack strapped to the outside. Purchased the Alps "cyclone" compression sack size M to go with it (btw, this is by far the best compression sack I've found, but that's for another review). Given the high loft and generous fit, I was surprised to actually be able to stuff it into the bag compartment of my internal frame pack. Works with mine, but can't guarantee it will fit in yours.

As I said, this bag has a more generous/spacious fit than most mummy bags. Finally a mummy that doesn't make me feel claustrophobic. Once it's had a chance to expand, the bag/loft is fairly thick. Haven't put the temp rating to the test. I've used it almost exclusively Spring, Summer, and Fall. I didn't freeze at 40 or sweat at 65. Did spend one night in it below freezing, but I was wearing a level 7 ECWCS primaloft suit so that doesn't really count.

As of now, I got about 30 nights in this bag and aside from some dirt, it looks brand new. So far it's wearing well. I do store it in a large tupperware so it has plenty of room to breath. Did get the zipper stuck once, but was able to get it undone. The hood and draft collar work pretty good. It zips from both the top and bottom. 3lbs 12oz isn't bad considering the size of this bag and that it's a synthetic fill. Have 20F down bag that is a lb lighter and compresses a good 30% more, but it also cost 5 times as much and takes forever to dry out.

This bag is very good quality for the price. Not for ultralight backpacking obviously, but good for most purposes. I like it so much that I bought the -20F version in XL wide for hunting season, but that one is big enough for 2 of me and weighs a lot more. Not something I would ever pack.


Does its job

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

These Alps bags kept us warm in our tent. Temp got down to 35 degrees. The zipper can be tricky. Tends to stick.