The karrimor superlight 4510 litre rucksack features a new va backsystem to offer minimum weight on a pack that has multiple storage options making it a fantastic pack for the weight conscious backpacker the superlight rucksack weighs in at just over 1kg and has a va backsystem that is adjustable via a secure velcro adjustment so that you can get your pack to be the correct length for your back it also has an internal frame sheet to give it good load transfer structure while keeping the weight