Waterproof compression sack without all the extra doodads.

Outdoor Research did away with heavy, bulky valves and made the AirPurge Dry Compression Sack with a section of air-permeable fabric to maintain waterproof performance. Basically, you can fill this compression sack, close it, and cinch it down while air escapes from the breathable-but-still-waterproof fabric. Think of this Outdoor Research sack as a vacuum sealer for any gear you want to keep dry.

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Outdoor Research AirPurge Dry Compression Sack

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Here's what others have to say...

5 5

Great gear!

  • Familiarity: I've put it through the wringer

I have used the OR Airpurge Dry Compression Sack for two years now in a couple of sizes. The 30L sack held all the gear required for 10 days on the water canoeing in Ontario in the summer. Used at several camping trips and deployed with it. It holds up well, works great. If needed you can loosen two straps and use as a day pack. Awesome for anyone who wants to keep their stuff dry. Used the 5L sack inside on the canoe trip to hold "wet" stuff and keep it all together in the 30L bag.

what size would you recommend for a down...

what size would you recommend for a down 15 F marmot sawtooth long? 10 or 15L?

Responded on

I have a Marmot Never summer and fits OK in a 10L (It takes a longer time than traditional commpresion sacks.

5 5

Perfect fit for Pinnacle 15 F bag

  • Familiarity: I've used it several times

I ordered two of these bags for our Marmot bags. It is a perfect fit for the Pinnacle 15; probably could even fit it in a 10L. My wife's Marmot Ouray is a bit of a tighter squeeze, but still get it in with some good stuffing. The bags are burly, and the eVent makes it easy to compress down.

Fortunately, I haven't had to test the waterproof capability quite yet, but I am not worried about it.

Unanswered Question

I am looking to stuff my North face Snow...

I am looking to stuff my North face Snow leopard synthetic fill (male long) in one of these bad boys, (with ease) what size should i be looking for?

5 5

Amazing Product

  • Gender: Male
  • Familiarity: I've used it several times

I initially bought the 15L to use as a stuff sack for one of my military sleeping bags. It worked great! So great I ended up going out and buying one in 10L so I could compress my clothes and keep them dry as well. This product lives up to what its supposed to do. I have used it many times now and have not noticed any wear and tear, so its really durable too. This is an essential item every time I embark on an out door excursion!

5 5

Fits the bill, and the sleeping bag

I have a Mountain Hardware 35/50 Flip sleeping bag (synthetic). The stuff sack my sleeping bag came in is 7"x16". I bought the black 10 L AirPurge and the sleeping bag fits easily and compresses significantly. I have not had any issues with the sleeping bag getting wet after a long rainy hike.
As for a comparison between this and the Sea To Summit eVent, the eVent is lighter but the material of this sack seems stronger to me.

5 5


This thing is overbuilt in a good way. Swallowed up my 725-fill down bag to about 1.5 volleyball size and stowed perfectly in my separate sleeping bag compartment on my pack. Stuff bag into the bottom of the compression sack with care not to trap air at the bottom. Any bag worth its loft won't fit automatically - most often you can get it to the point where the bag is stuffed just barely inside the unfurled dry sack. Just turn the compression sack upside down with the roll top on the bottom and push down so the air escapes the opening (not the air permeable barrier). Pack the bag in some more and repeat until you can close the roll top. Now compress in the traditional way, tightening the straps and taking care tuck the sack excess in as you compress.

4 5

a dry sack is a good sack

I use this for my big agnes encampment sleeping bag and air core . sinches down good with roll top and clasp keeps out the water.

works great

nice water tight inner membrane . sturdy compression straps .
should see years of service with this sack

4 5

Great compression, great Impression!

I have 2 of these in 30L. I packed my gear to live in Afghanistan for an entire year, using these two compression sacks. I have received compliments and looks of amazement as I pulled these out of my backpack - due to the amount of stuff they hold and how compact they get. In fact, I have been living out of them for 4 months, traveling around the world and never had an issue. I wish I could make them smaller in circumference, but thats the ONLY downside. You wont regret this purchase, whether you are gone for a couple days to traveling around the world for a year!

5 5


I have the WORST sleeping bag, as far as rolling and storing is concerned. With this sack, I literally just stuff it in there and voila! It sits on the top of my pack like it was made to be there! The straps and loops make it easy to secure on the pack. Love it!

10 L durable dry sack (red), 10L Air purge compression sack (black and orange), 3L Dry Ditty Sack, 1L Nalgene

10 L durable dry sack (red), 10L Air purge compression sack (black and orange), 3L Dry Ditty Sack, 1L Nalgene

what is this like compared to the Sea to...

what is this like compared to the Sea to summit's eVent dry compression sack. It looks like both bags would be pretty similar, I am just curious about the way this bag has the compression straps attached to the bag top rather than have the compression straps wrap around the bag as a whole (like sea to summit's compression sacks do)

Responded on

Not quite as nice as the Sea to Summit in my opinion, although a little burlier. The strap wrapping of the OR does not pose a problem for compression at all, both this and the STS work well for the intended purpose, but I'd get the STS because of the lighter weight.

Responded on

Hey there - I like the OR AirPurge. It is burlier, and the compression works great. The orange band around the bottom is actually a Gore membrane, so the air purge works really well and it is completely dry. Also, OR's warranty can't be beat: "Infinite Guaranty." No matter what, OR will take care of you!

5 5

Great stuff sack

I use the 10L stuff sack on sea kayaking expeditions and it's a great stuff sack for any aquatic activity. It fits my 32 degree Ultralamina and there is enough room for a shirt and socks. The only downside is it is a bit heavy for a stuffsack for backpacking, but it's worth the weight to keep my sleeping bag dry. This durable stuff sack beats the old regular stuff sack lined with a garbage bag trick any day in terms of durability and style!

Overall, it's a great design with waterproof breathable material that allows this dry sack to truly compress. Highly recommended.

5 5

must have

well worth the money... dry clothes are priceless, dont leave home without it.

4 5

You Get What You Pay For!

I just got home from a hike in New Hampshire Presidential range. Thee days of pouring rain is enough for me to give a review. This bag is water proof, & strong. Although I found it to be a little heavy. I used it to keep my Big Agnes sleeping bag dry.I would recommend it to anyone who backpacks. money well spent.

AirPurge Compression Sacks - Outdoor Research

Nathan talks about the AirPurge Compression Sacks. In addition to protection and durability, the AirPurge Dry Compression Sacks feature an air permeable/waterproof fabric band that purges excess air from the sack during compression. Fully taped seams and a roll-top closure provide complete water protection.

5 5

Great sack!

Looked in the local stores for something that would hold all our gear, yet wasn't too big. Couldn't find anything. This is it. It is easy to pack and very easy to seal. And, yes, it kept our stuff dry! Thanks backcountry!

4 5


Love the compression bag! Gets very small and is very tough! Thanks for the awesomeness Backcountry!

4 5

AirPurge Dry Compression Sack

The compression sack is awesome and gets pretty tiny. Very happy with the shipping time and the product. All around awesome! Thanks Backcountry!

5 5

Dry clothes are NOT overrated!

I have a OR sack very similar to this one, and it is absolutely fabulous! The ability to stuff your clothes in this sack and compress it and leave it out in the rain, and in the morning, when you are wet and freezing cold, to be able to pull out a dry shirt, when everything else that you have is soaking wet, is a feeling that you can't put a price on. This is a must have piece of gear if you have ever had to backpack in the rain.