Outdoor Research Ultralight Compression Sack


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This lightweight compression sack reduces sleeping bags and other stuffables to a pack-friendly size; the Outdoor Research Ultralight Compression Sack features silnyl fabric that 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.

Formerly known as Helium Compression Sacks™


  • 40D ripstop siliconized nylon
  • Drawcord and Hypalon® cordlock keeper closure
  • Ripstop nylon compression rings
  • Four compression straps
  • Bound seams on end caps for durability
  • Lid has built-in stuff sack for self storage

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Review Summary

4.8 out of 5

8 Reviews

  • Great design: 4
  • Build quality: 3
  • Ease of use: 3
  • Performance: 3

  • Cost: 1
Function: 4.8 / 5
Quality: 4.6 / 5
Water Protection: 3.5 / 5

8 Ratings & Reviews

Function: 5 / 5
Quality: 5 / 5
WaterProtection: 4 / 5
from Redmond, WA

Strong, quality bags that compress well
March 17, 2012

These OR compression bags cost a little more than some compression bags from other manufacturers, but they pack my sleeping bag and clothes tight, are easy to use, and seem like they are very high-quality. I won't know for sure how durable they are until after a few summers of backpacking and camping, but they seem great when they're new.

Pros: Great design, Build quality, Performance, Ease of use, Cons: Cost
Function: 5 / 5
Quality: 5 / 5
from NYS

Cpmpression bag for big fluffy items
February 13, 2012

This is a large compression stuff sack that is strongly made and easy to handle. I'm using them to compress down large sleeping bags and fluffy jackets. Like most products from OR, it is high quality.

Pros: Great design, Build quality, Ease of use
Function: 5 / 5
Quality: 5 / 5
from NJ near PA
35-44 yrs

Awesome Bags by OR!
September 30, 2010

Had some sleeping bags lying around without any proper storage. Bought 2 of these compression bags (25L and 35L) and they work perfectly. Nicely built bag, easy to use. I am planning on getting more.

Pros: Great design, Build quality, Performance, Ease of use
Function: 4 / 5
Quality: 4 / 5

true size
March 21, 2011

Make sure of the stuffed size of your bag before you make a compression sac selection. These sacs will fit true to size with no extra room, so buy big and use the compression to shrink your bag's stuff size.

Pros: true to size, Cons: true to size

February 25, 2010

Great bag really saves space. I'm looking to buy more for a long term trip

April 04, 2010

Great sacks, have used them on numerous trips and really sizes things down. Id purchase again in the future,

Function: 5 / 5
Quality: 4 / 5
WaterProtection: 3 / 5
25-34 yrs

Throw away your old stuffsack
January 07, 2012

This compression sack is super lightweight, and even stuffs inside itself for easy storage. The material seems robust and the product is well made. It can take some practice to pack it efficiently. Be sure to alternate on the compression straps. My biggest gripe with the product? Ordering the right one. Be sure to check your sleeping bag or ten's volume before ordering. I had a average sized mummy 0C sleeping bag, and it ended up fitting the 15L perfectly. Recommended over the manufacturer specific bags!

Pros: Great design, Performance, Great value

Looks good
December 20, 2009

The 15L size fits my 0F down bag well, and compression is decent. Appears to be solidly constructed.. we'll see how it fares with use.

Also Available

Outdoor Research Ultralight Compression Sack Photo

Alloy and Lemongrass.

Available sizes, while supplies last, include size 5l, size 8l, size 10l, size 15l, size 20l and size 35l: 5l, 8l, 10l, 15l, 20l, 35l.

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