Arid 9L H2O BackpackThe non restrictive Arid 9L H2O backpack we developed together with luggage experts, Kriega, offers an ideal combination of lightweight comfort, storage capacity, and hydration capabilities. The backpack features a 4 litre waterproof roll top main body and a separate 5 litre, zip access hydration compartment that can be fitted with a 3. 75L Hydration Reservoir (sold separately). The external Hypalon net with an elastic cord adds useful additional