Its superior carry comfort is down to the deuter Aircontact back system with Air Spacer mesh and a large ventilation channel, plus ergonomic ActiveFit shoulder straps and an adjustable sternum strap. The Y-shaped frame, mobile hip fins and ergonomic lumbar pad combine to distribute the load effectively. A full-length, J-shaped zipper on the front makes contents easy to locate lower down in the main compartment. While large, detachable hip fin pockets (3 L) provide extra storage and keep items within reach. A zip-out 1.5-liter bottle holster also lets you hydrate on the move.