Frontiersman Insider Bear SafeA storage capacity of 11. 86L 734. 64 cubic inches that's ideal for multi day hikes with family and friends. Its ergonomic tapered shape provides greater space efficiency, fits inside backpacks, and assists with the hiker's center of gravity for better posture and more energy. An integrated pressure release valve automatically regulates and adjusts air flow when the force of a bear is applied. It uses malleable, no break polypropylene material that