The lightweight Z 35-R Backpack features Gregorys rugged Jetstream DTS ventilating suspension system, and with 2,135-cubic-inches of storage this backpack is ideal for a long day hike or a quick overnighter. Gregorys Jet Stream suspension system features aperforated frame sheet and a mesh back panel to increase air flow so you dont sweat to death underneath your pack. Aluminum stays provide lightweight but sturdy vertical load support, and scapula and lumbar pads make carrying your gear more comfortable. Both the waist-belt and harness have moisture-wicking mesh to keep you dry underneath your straps. Access your gear through the roll-top lid. Stash anything you want within easy reach, such as a shell or energy bars, in the Z 35s external pockets or the waist-belt pockets. Water-resistant zippers help keep light precipitation away from your gear. The high-quality ripstop nylon combines durability and low weight.