It is an old model or a product that we can no longer order at the manufacturer.
Great product, have used same rucksack for running and several hiking trips in the Alps in various weather conditions. It minimises sweat on the shoulders and lower back, has plenty of space for waterproof jacket, surplus clothing food and drinks bladder. Bought from Hard Loop which has a fast efficient service, well packaged goods, good parcel tracking and well informed customer service. Would definitely buy such products again from Hard Loop 👍💯%