Peak Design built the Outdoor Backpack 45L around a lightweight internal frame and a vest-style harness that distributes load across more of the body than a standard shoulder-strap design, aimed at gear-heavy single-day adventures or light overnight use. A proprietary Ultra Cinch roll-top gives one-handed access and 10.5L of expansion, while a huge rear access panel is built specifically to work with Peak Design Camera Cubes for outdoor camera carry. The 210D ripstop nylon Terra Shell fabric is 100% recycled, Bluesign approved, and PFAS-free, with an optional Rain Fly for full waterproof protection. Vest-style harness system: distributes load across the body with a removable, adjustable padded hip belt and Capture Camera Clip attachment points. Ultra Cinch roll-top access: one-handed packing with 10.5L of expansion capacity. Rear access panel for camera gear: fits up to a Large Camera Cube (sold separately) for organized outdoor camera carry. Terra Shell 210D ripstop nylon: 100% recycled, Bluesign approved, and PFAS-free; Fair Trade Certified and carbon neutral. 5 external Flex Pockets and Cord Rails: quick-access storage for water bottles, tripods, and hiking poles without a floppy profile.