ALPS Mountaineering Crescent Lake Sleeping Bag: 20 Degree Synthetic

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.

  • Reviews
  • Q & A

Great bag for the buck!

  • Familiarity: I've used it several times

We bought a pair of these for our older two boys (12 and 14) for scout camping. For them, the bags worked great. They stayed warm while camping near the lake at a moderately chilly ~45 degrees, and didn't complain of the zipper problems in other reviews. As a starter bag for scouts, especially for the cost, you can't go wrong.

Good for a budget, not for temps

  • Familiarity: I've put it through the wringer

Bought it to fill out the 20 degree spot in my low-budget collection. Great in milder conditions but it hasn't really held up well at temps below 30 though. Pretty much behaves like my MH Lamina (35 F), except bigger when packed.

Overly toasty...

  • Familiarity: I've put it through the wringer

I got this bag on a budget, this bag is great but could be better-draft tube internal pocket and zipper on the right instead the left.

Anyways, I have slept many nights in this bag and granted it is bulky and heavy I have gotten it to compress to half the size it is normally it's still a great piece. It does need "venting" I do not dare sleep on the couch with I wake up sweating every time. It does just fine on a pad where excess heat can dissipate freely. I LOVE how roomy this is I bought the wide version and even though at 5'6" 130lbs, I toss an turn a lot and this bag fit the bill. I have had it out in high 30's and tee shirt and shorts and does what it's supposed to do. Even bought the wife one. The other thing is that I've had to change the way I zip it up since there is no tube near the zipper if your not careful you'll snag it every time. But for the value I'm not too concerned. Most of the time I leave it open anyways. I did pair it with thermarest neo camper sv, it does hang over the sides (a couple inches) it covers the whole pad so I'm pleased.

Overly toasty...

Can you zip two bags together?

Hey Jan,

this sleeping bag won't be able to be zipped together with another of the same bag as it only has one side zipper. Let me help you find a bag that works by emailing me at

Budget Bag of Awesome!

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

So the takeaway from this review should be that for the money, you aren't going to find a better bag. Great for Car camping, but not super light or compact for backpacking.
I have camped comfortably into the mid 40's (f) in this bag and have no doubt that it will keep me comfy into the mid 30's (f) I have only used it a couple of times but am happy with my purchase and would gladly make the same decision again.

Great value

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

I love ALPS gear because of their quality and affordability. This is a great, warm sleeping bag, especially for the price. Would recommend.

stylist sleep sack

    quality bag. nice bright green color allows you to see it easier at night. warm as you would want it for 3 season camping. Zipper zips all the way up and you snuggle in there deep. not the most space efficient bag but it is warm.

    Pretty good

      Bought this for my wife for some summer camping trips, not very compact but she seemed to still enjoy it

      Best Budget Bag!

      • Familiarity: I've put it through the wringer

      Alps Mountaineering is amazing when it comes to quality gear for the person on a budget. This bag has kept me warm on numerous car camping adventures. It is comfortable and I feel like I have enough room to move around at night. If you are looking for a great sleeping bag for an amazing price, go for it!

      Hey, I was wondering what size compression sack this would fit in? I was looking at the ALPS Mountaineering ones with 4 straps, but didn't know what size would be appropriate. Any guidance would be appreciated!

      Toasty toasty

      • Familiarity: I've used it several times

      Keeps me toasty in 45 degree weather, love how roomy it is. Definitely not a backpacking sack but a great vehicle camping sack. Silky texture. Seems like it'll last if stored in compression sack (sold separately). Happy especially at the $50 price I paid!!

      What is the weight of this sleeping bag? Thx

      Hey Andreas!

      here are the weights of this sleeping bag in the Regular and the Long

      Regular: 3 lb 12 oz

      Long: 4 lb 6 oz

      Shoot me an email or call if you have any questions!


      Courteous and helpful service

        This online store is the greatest. I was having some difficulties in determining shipping costs. The online chat service was so helpful and nice while helping me with my order. Thank you for your help, Backcountry!

        sleeping bag

          looks good and feel good on my body. use for camping trip.

          Black Canyon Of The Gunnison

          • Familiarity: I've used it several times

          Took this bag with me on my two week road trip thinking it would be a big help throughout most of my cold destinations, and it did until the night I spent at the Campground in Black Canyon. In my Alps Mountaineering tent, sweats, wool socks, thermal sleeping pad, snow falling on my tent, sleeping bag zipped up and Velcro strapped all the way up and all I could think about was how cold my feet at back still were. This bag definitely did not stand up to those conditions. And it was about 34 degrees out. All other spots it was fine. Just don't take this bag out to snowy areas.

          Black Canyon Of The Gunnison

          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.