SealLine's premium backpack-style dry bag, the Pro 70-120L Dry Pack is made for portaging, pack rafting, big river running, and worry-free traveling in soggy conditions. The Pro features a fully-adjustable suspension system with padded shoulder straps, lumbar padding, and a breathable back panel that's adjustable to fit torso lengths of 17 (size S) to 21 inches (L). That comfortable and supportive harness is also removable if we want to convert the pack to a more conventional dry bag for travel or day trips. Of course, the pack is fully waterproof with a PU coating, sealed seams, and a DrySeal roll-top closure to protect our clothes, gear, maps, camera, and electronic devices.