17,000x more odor resistant than HDPE for maximum freshness
Double zip closure ensures 100% water and air tight sealing
Durable film construction outlasts closure for long-lasting use
Disposable design for convenient single-use applications
Compatible with Ursack for enhanced bear protection
Summarized by Shop
This 12 X 20 sealable plastic bag is made from a special film that is 17,000 times more odor-resistant than HDPE. When used properly, the OPSak is 100% water and air tight. New double zip closure. Each bag in the 2 pack weighs about 1 ounce. Use with Ursack to keep bears and other critters from smelling your food. The bags are considered
Dimensions
12 x 20 in
Material
Special film plastic
Closure
Double zip
Weight per bag
Approximately 1 oz
Color
Clear
Pattern
Solid
Summarized by Shop
4.4
9 ratings
5
4
3
2
1
OP sac was roomy, sturdy and fit well inside the Ursack. I purchased after a red squirrel chewed into one of my Ursacks. I had no trouble with rodents on subsequent trip using OP sac, but can’t claim the OP sac was the reason. But it is an Inexpensive way to help protect your Ursack investment .
S
Susan · July 22, 2026
Works well, but 1 out of 2 was defective
D
Daniil · July 3, 2026
Previously I had purchased the Kodiak Ursack and this product. So I made another purchase cause I think that the product is really really good. I won’t be going into the wilderness until next summer. I am proud of the equipment that I have.
