Black Diamond Element 45 Outdoor Backpack Light, streamlined and built for the lightweight multi-day backpacker, the Element features reACTIV suspension system with Swing Arm shoulder straps The Element features both top-loading access and a large zippered sleeping bag opening The high-flow Open Air back panel maintains ventilation The floating top lid converts to a lumbar pack for quick side hikes, with exterior and hip belt pockets for storing on-trail essentials