The Explorer 4000 is a multi-position torso adjustable backpack that makes it simple for anyone to find a comfortable fit. With padded waist straps that move with you and wide locking hip straps, the pack will stay stable even when running or climbing. The pack has an internal aluminum frame for structure and support, which makes this bag both lightweight and comfortable. Large side zippered pockets with weather-guard zippers provide easy access to frequently used items. There is also a sleeping bag compartment that makes it easy to access your sleeping bag whenever you need to.