Are O.P. Saks Really Odor-proof?
Well, yes, quite so. We slathered a bunch of honey, peanut butter, and olive oil in one and left it out for four days in the corner of a forest service cabin while we were out tramping around on a hike. We knew the cabin to be infested with both mice and pack rats, and when we came back, the O.P. Sak was intact with no sign whatsoever of animal intrusion, despite the fact that there were fresh droppings and sawdust scattered throughout the cabin. Ursack liners are actually O.P. Saks. And, we’ve been using O.P. Saks for food storage while backpacking in both grizzly and black bear country in Glacier NP, Yellowstone NP, the Bob Marshall Wilderness, Tetons, Wind Rivers, and Uintas. Below the treeline, we simply add a mesh sack with a drawcord and hang our food with AirCore Plus. Above the treeline, we store the O.P. Sak under a pile of rocks, or sometimes, just sleep with it next to our shelter. Even in the most rodent-and-bear-infested areas, we’ve not had a single curious critter attemp
