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URSACK Major Bear-proof Bag

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The Ursack Major is made of “bullet proof” UHMWP fabric and is designed to prevent bears from getting your food in their territory. It comes with an integrated six foot, 2,500 pound tensile strength cord. The Major weighs 7.6 ounces. It is about 24 inches in circumference (<8″ dia.), 14 inches tall and holds about 650 cubic inches (10.65 Liters). If packed only with freeze dried food, it will hold 37 single servings of breakfast, lunch and dinner. The Major does not come with an odor barrier bag (OPSak) or an aluminum liner. We highly recommend OPSak, which is designed to always be used inside the Major. The Ursack passed the Interagency Grizzly Bear Committee test and was placed on its bear-resistant products list on July 31, 2014. That list is the one relied on by many, but not all, wilderness agencies, and restrictions may still apply in some regions–check first.

Limited Lifetime Warranty. Ursack will replace, or refund the cost of, any properly-used Major in which a gap, tear or hole larger than 1/4 inch is caused by a bear. This 1/4 inch standard is the criteria used in the Interagency Grizzly Bear Committee’s test protocol. 

Note: Due to the difficulty in weaving high tech UHMWP, Ursack is not always able to deliver pristine black fabric. Your Ursack may arrive with minor cosmetic blemishes. You won’t see these once you have used Ursack in the wilderness, and these in no way compromise the performance of the product.  Some units may have different color thread or rope than those pictured.


·       Certified Bear Resistant
·       Material:  UHMWP
·       Weight:  7.6 oz
·       Capacity:  about 10.65 Liters  (approx. 5 days of food for 1 person)
·       Flexible
·       Cord:  6 foot–high tensile strength
·       Recommend:  Odor Barrier Bag  (OP Sak 12 x 20)

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