The moab jam rucksack from jack wolfskin is a tough and durable 18 litre rucksack that has an incredibly comfortable full contact suspension system plenty of pockets and adjustable hip and sternum straps making it ideal for demanding activities such as cycling hiking running and of course everyday use too the suspension system on the moab jam rucksack combines a snug fit with generous freedom of movement the central ventilation channel and the air permeable back padding optimise the carry comfor