Outdoor Research Ultralight Compression Sack

Priced: $23.96 - $39.00 Rated:   - 5 stars out of 5 by 13 reviews.
Outdoor Research Ultralight Compression Sack -
FEATURES of the Outdoor Research Ultralight Compression Sack.
SPECIFICATIONS of the Outdoor Research Ultralight Compression Sack.


  • Siliconized nylon ripstop fabric resists moisture and slides into your backpack with ease
  • 100% nylon, 70D TPU
  • Ripstop nylon compression rings


  • Wide range of sizes accommodates everything from jackets to sleeping bags

Weather and Wind:

  • Bound seams on end caps for durability


  • Four Compression Straps


  • Outdoor Research UltraLight compression sack has a pocket in the end cap that holds small items or can be used for self storage of the compression sack


  • Drawcord closure is quick and secure
  • Built-In Stuff Sack
  • Ultra lightweight
  • Low profile hardware
  • Drawcord and Hypalon® cordlock keeper closure
  • Ultralight design adds minimal weight to your pack
Outdoor Research has updated the Ultralight Compression Sack to make it even lighter by 20%. It reduces sleeping bags and other items to a pack friendly size.


Instead of strapping your sleeping bag to the outside of your pack like a rookie, pack it down to a manageable size with the Outdoor Research UltraLight Compression Sack and stash it in your backpack. The four-strap design cinches the internal items down, and the lightweight siliconized  fabric slides easily into your pack.

Mountain Gear
The Outdoor Research Ultralight Compression Sack can save you a lot of space in your pack thanks to its lightweight strap/cinch design.


The Outdoor Research UltraLight compression sack reduces sleeping bags and clothing items down to a pack-friendly size.


Rock/Creek Outfitters

20% lighter than its previous incarnation, this lightweight compression sack reduces sleeping bags and other stuffables to a pack-friendly size. The silnyl fabric resists moisture and slides into your pack with ease. A pocket in the end cap keeps track of small items or can be used for self storage.

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Average Price History: Price History
Review RatingNumber of Reviews
Compression straps:5 liters
Dimension / Rolled:25 1/2 x 11" / 65 x 28 cm
Dimensions:See size chart
Gear capacity (L):Backpacking
Gear capacity (cu. in.):Backpacking
Material:100% nylon , 30 D siliconized nylon ripstop ,100% nylon 70 D TPU
Volume:2136 cubic inches / 35 liter
Waterproof:10 liters
Weight:305 cubic inches
Compare specifications to related products.

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Outdoor Research UltraLight Compression Sack-10LOutdoor Research UltraLight Compression Sack-10L$30.00
Outdoor Research UltraLight Compression Sack-15LOutdoor Research UltraLight Compression Sack-15L$32.50

Related Categories:

Outdoor Research

Outdoor Research Ultralight Compression Sack Reviews:

Positive Reviews:

High quality compression sack

Picked this up almost by accident during the recent REI annual sale. Wanted a 10L compression sack for my sleeping bag and the less expensive Sea to Summit model was out of stock in that size. Took a look to see what made this more expensive. Here is what I found:

- Straps are double-stitched where they connect to the bag.
- Two of the straps feature quick release buckles.
- Can stow into a small pouch within the lid when not in use.

To some this may not be enough to justify the higher price over less expensive compression sacks. For me though the peace of mind having double stitching was huge. Think about it, where will a compression sack receive the most stress over its lifetime? Right where the straps are stitched to the bag. And considering the kinds of stresses that compression sacks take this seems like a no brainer to me. Having it stow inside its own lid, and having quick release buckles were just icing on the cake.

Overall a great compression sack. Nothing wrong with Sea to Summit or any other brands. This sack just sets itself a little higher above them.
Jon B at REI on 06/06/2013

Great System

I bought this sack to help create more space in my backpacking bag. I actually used this for my sleeping bag and it worked great! I bought one for myself and my boyfriend in the 15L size which is the recommended size for a sleeping bag. The ties on the side allows you to get it really compacted without having to really use all of your own strength. The material is really thin making it light weight but it was also really durable because I attached it to the outside bottom of my pack and was setting down or propping it up on the ground and other surfaces.
The bonus was that it was on sale and was just as much as the REI brand, maybe even a little cheaper.
Kayla S at REI on 09/09/2013

Easy to lash to pack

Although it is a very tight fit, I stuff my full size (72 in.) synthetic sleeping bag into the 10L compression sack. (I would recommend 15L for an easier fit, but 10L is feasible.)

For external lashing to a pack, feed the tie-downs through the compression straps for zero slippage and maximum stability.

I lash mine to the bottom of my pack which means it is the first thing to touch the ground when I set my bag down. To date, I have not had any rips, tears, or even scuffs, despite the extremely thin ultralight fabric.

Would highly recommend this product to friends. (I just ordered a couple more myself.)
Mark Edward Zona at REI on 10/10/2013

I bought this to fit a blanket I bought at the PX in Kandahar but the blanket was too big. It needs the 8L. But my poncho liner fit perfect without too much bulk. Others have noted that there are no side cinches. I may get some straps and see if I can make that work myself. Planning on buying the 25L one for my sleeping bag. OR makes great gear. Looks like this is an updated version of the orange and gray ones on discount. It looks like the tube material on these is thinner and likely lighter. I also like the quick-release buckles.

MikeD at Backcountry.com on 10/06/2013

Very good

4 straps, but 2 are buckles. This is great for not fussing with opening and closing the sack. Set it apart from others. The fact that it contains its own stuff sack is also key for throwing it in your bag. 10L size fits my North Face Mercurial 1S sleeping bag with a bit of room to spare. Packs down very small. Purchased this over other brands, such as Sea to Summit. Smelled like fish when it came out of the package though?
Nick at Rock/Creek Outfitters on 01/01/2014

Just what I needed

I needed a better compression sack for my sleeping bag than the one that came with it (I have a synthetic bag -Northface Cat's Meow Long). This Compression sack is the perfect size. It easily compresses the sleeping bag down to considerably reduce pack size. It feels very strong despite the pressure that builds up within. Lastly, the bright yellow color helps me find my bag when down at the bottom of my pack.
RaneyClimbing at REI on 05/05/2013

I bought two of these a 5l and a 10l for light backpacking.What I really needed was two of the smaller ones for summer packing. I was able to get my complete sleep system into tha small bag and will be able to get my complete colder weather system in the large one.weight listed was right on.

pm1p536498 at Backcountry.com on 07/01/2013

No way to lose the top of the stuff sack and is nice and light, I swapped out my tent bag for this to save on some space. ended up purchasing the 8L works perfect for the tent i own,The North Face Mica Fl 2.

Evan Grott at Backcountry.com on 08/31/2013

I purchased the 8L sack for my clothes in my pack & it is PERFECT for this! Super Lightweight! Quality! Perfect!
As soon as I put this sack through some real trail time I will let you know if my feelings change!

Anthony and Ashley South at Backcountry.com on 12/20/2013

I have the MontBell U.L. Super Spiral Hugger #0 Sleeping Bag: 0 Degree Down sleeping bag in regular length and it fits perfect inside the 15L compression sack. Fairly lightweight and it compresses well.

Laurel Nelson at Backcountry.com on 03/18/2013

Neutral Reviews:

This bag is great at what it does, but one issue that happened is that where the strap is sewed to the top lid, the fabric ripped already. This happened on the first use! Not full quality like you would expect from Outdoor Research gear. Still using it, but disappointed.

Amadeus DeKastle at Backcountry.com on 10/29/2013