Opsak Barrier Bag 7" x 7" (2 Pack) Cassette High-volume dual valve allows for

High-volume dual valve allows for efficient and easy inflation

featuring an agile OOfoam™ strap for additional support and comfort

Seamless compatibility with all giro helmets

Ultimate power

heat-reflective tech of the Ruler's heat-moldable liners

Opsak Barrier Bag 7" x 7" (2 Pack) Cassette High-volume dual valve allows forAlong with being 100% water airtight, the OPSAK (Odor Proof barrier bag) is also 100% odor proof. Loksak uses a film that contains a barrier so odors dont permeate from the OPSAK. All Loksak bags are FDA approved. You can store food undetected to bears and other pests in your campsite by sealing them in the OPSAK. You can even pour boiling water into the OPSAK because of its extreme heat resistance, however, you cannot sit the bag in boiling water or