Opsak Barrier 7 X7 3Pk Review

I've tested these bags pretty thoroughly and have concluded that they aren't airtight or odor proof. In both areas, they roughly correspond to zip-top freezer bags, but the plastic is significantly thicker and therefore more durable. I haven't checked if they are waterproof. My Test: I used Esbit solid fuel cubes which have a fairly strong odor so I wanted the bag to be odor proof and also so my weak human nose could detect the smell coming out of the bag. . First, I washed my hands thoroughly.