ALPS Mountaineering Compression Sack

Pack small, travel fast.

The Alps Mountaineering Compression Sack not only shrinks bulky items like sleeping bags or puffy jackets, but it also features a zippered pocket in the lid to keep smaller items from getting lost in the depths of your pack.

  • Four compression straps
  • Top lid with zippered pocket
  • Bottom handle
  • Double stitched seams
  • Reviews
  • Q & A

magic sack

  • Familiarity: I've used it several times

fits my Marmot Col Sleeping Bag: -20 Degree Down perfectly and really makes a huge difference when packing for trips. perfection

Derrick, I have the -40 Marmot and cannot find the perfect sack. What size did you get? Do you think the -40 would fit?

Love the straps

  • Familiarity: I've used it several times

I love how sturdy the straps on these compression sacks are. I also have the Sea to Summit compression sacks which are great for cutting weight, but the straps are a pain to deal with. I can easily fit my 30 degree down bag in a size small.

Compression at Work

This is the Medium Sack at about 3/4 compression capacity with my 0 Degree Down Back inside.

Compression at Work

Is the sack waterproof?

Great Piece of Gear to Have

  • Familiarity: I've used it several times

I needed a compression sack for my down sleeping bad during an upcoming trip. This was the perfect option, durable, solid, compresses well and multi-functional. I felt that I could really crank down on the straps without feeling like I was going to break anything. I feel like there are a million uses for a compression sack if you are a big camper, and this a well-price, solid option.


  • Familiarity: I've used it several times

Just using for vehicle camping to stuff a huge puffy bag and liner in. Compresses well. Seems durable enough. Great for the sale price!

Solid useful gear

  • Familiarity: I've used it several times

I picked up a few small sized bags to tame tents and sleeping bags on a family backpacking trip. Tough and functional.

I have a Kelty Cosmic 20, which bag is right?

Hey Mark - I would recommend the Small compression sack for your Kelty Cosmic 20 sleeping bag. Feel free to contact me directly with any additional questions.

- Kyle L. - Expert Gearhead


  • Familiarity: I've used it several times

Probably the best thing I could have had on my recent 4 day hike.
I packed clothes in the small sack and compressed it down to put in my 65L pack with me. It worked like a charm. Gave me plenty of room in my bag and my clothes organized. The small was plenty enough for me on this hike. I have the medium as well, but probably would only use it on a longer hike than 4 days.

Strong, good looks and great price

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

Originally bought this for a backpacking trip in the North Cascades. This thing really came through. Super sturdy, strong material and does exactly what it needs to do

Great compression and nice color

  • Familiarity: I've used it several times

Got the L size for a -20 C TNF sleeping bag, the sleeping bag is huuuuge and couldn't fit inside my backpack with the compression bag included so I bought this bag and the four compressing straps make the difference, construction is great for the amount strength applied to the straps and overall compression bag.

Great compression and nice color

Works great

    High quality at a great price!

    Strong and Well-Designed

    • Familiarity: I gave it as a gift but have feedback to share

    Bought this as a gift and the XL fits a bulky synthetic sleeping bag with some clothes on top no problem. My sister was not looking for the lightest or most space saving option, just a solid compression sack for camping. So far she is happy with how durable the straps are even when you really tighten them down. She could probably size down to a L and still fit her bag, but having the extra space is not a problem

    Smaller is better...

    • Familiarity: I've used it several times

    Well, in this case it is... The small (Blue) is the most useful for my purposes. IN TWO of these I can fit a tent (3 person Mountainsmith) and in the other I put a rain fly and ground cover. Worked great

    sufficient for my needs

      Wish there were straps that would keep the extras from flapping around.

      Sz small is good for clothes

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

      I was off in gauging what size I would need. A few reviewers have mentioned that they're able to get a single sleeping bag into a size small. I have a cheap synthetic 40 degree sleeping bag from Wenzel and it wouldn't fit into the small. Maybe a medium would've done the trick. Since these were on sale, I had bought 2 of them. Too much of a hassle to return them so I will just keep them to pack clothes (fits about maybe 3-4 days of outfits). The compression straps are very easy to tighten and loosen because of the buckle's design. You won't have to strain a muscle by trying to squash the bag down to make it smaller nor will you have to lose a finger attempting to free your cargo from the sack.

      stellar for the price

      • Familiarity: I've put it through the wringer

      These are well built compression sacks.. once upon a time I fit a bulky synthetic sleeping bag into one of these and lugged it around behind me lashed to the underside of my pack. When I finally decided it was too good of a work out and that I should upgrade to a highly compressible down bag, this compression sack was by no means retired. It's fantastic for shrinking down a weeks worth of clothes into a manageable bundle that can be easily unloaded in camp. Every winter I restore it to its original purpose, housing a 0 degree synthetic SlumberJack sleeping bag which is stored in the back of the Jeep as part of the family's winter car kit.

      Solid compression sack

      • Familiarity: I've used it several times

      I use the medium sack with my Northface Superlight 0 degree down bag, and it works great. The bag just barely fits in the compression sack, but then the sack holds it and and cinches down really well. Solid construction - I feel like I can yank on those straps as hard as I want.
      Zipper pocket in the lid is a cool feature.

      Unanswered Question

      Would the Alps Mountaineering Razor liner/bag be too small for the small? just curious because the sea to summit xs event sack is supposed to be perfect size?

      I have a 6'6" Kelty Ignite DriDown 20 sleeping bag. I'd like the smallest diameter compression sack that can work with this bag, do you think I could get away with a small compression sack or would I require a medium?

      Best Answer

      I have a 6'6" Northface Furnace 550-fill down bag and it fit's perfectly in the small size compression sack.

      i like these but not #1 to me

      • Familiarity: I've used it several times

      I bought this compression sack even though I have another brand of compression sack that I am in love with. this sack did its job, I don't really have any complaints. why is this a 4 and not a 5... really just because I still love Sea To Summit Ultra-Sil eVent Compression Dry Sack so much! the alps bag feels thicker and not as movable to me. but it does do its job.