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  • It measures about 8 x 18 in., holds about 925 cu. in.; and weighs 8.7 oz.
  • Comes with an integrated 6 ft., 2,500 lb. tensile-strength cord
  • Ursack highly recommends using an OPSak odor barrier bag or an aluminum liner (both sold separately) with the S29 AllWhite bag
  • Updated version features a tighter weave and more than double the tear-strength of previous models
  • Passed the Interagency Grizzly Bear Committee (IGBC) test and was placed on its bear-resistant products list on July 31, 2014
  • The IGBC list is relied on by many wilderness agencies but not all; wilderness restrictions may still apply depending on where you travel—please check first

Made in USA.

View all Ursack Bear-Resistant Food Containers

REI membership


Best Use Backpacking
Gear Capacity (L) 15 liters
Gear Capacity (cu. in.) 925 cubic inches
Material(s) Spectra
Dimensions 8 X 18.5 inches
Weight 8.7 ounces
Rated 5 out of 5 by from Lighten up! Just got this baby, stoked to put it to use! Weights > 1/4 the traditional bear vault. And fits wherever you cram or in your lack... Now, BACK TO THE SIERRAS!
Date published: 2016-08-15
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Planning a PCT Thru-Hike. Will this bag be accepted by the park services and rangers along the way?

Asked by: nicktallman
Each park is different so you would need to check with each park individually, but generally most parks require actual bear canisters instead of a bear bag, so this item will not work.
Answered by: REIservice
Date published: 2017-04-23

Will this fabric also withstand rodents as well? Haven't really had an issue with bears as so much rodents climbing down the rope and chewing a hole in the bag.

Asked by: eldest90
According to Ursack there is no good way to test the critter resistance of the Major S29.3 AllWhite Bear Bag, but so far feedback has been excellent. ​ If you are only concerned about smaller critters than bears you may want to consider the Ursack Minor, which is designed specifically to keep critters out, but not bears.​
Answered by: REIservice
Date published: 2017-03-29

What size Loksack should be used with the Ursack Major?

Asked by: Jack
The 11" x 9" bags are a good choice for this bear bag:
Answered by: REIservice
Date published: 2017-06-05

Does REI carry the cord used in the Ursack Major for purchase by the foot?

Asked by: JHSX
​The Major S29.3 AllWhite Bear Bag comes with a ¼" polyester drawcord. Due to the strict testing protocol we suggest contacting the manufacturer for any replacements parts or repairs.
Answered by: REIservice
Date published: 2017-02-11
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