Only used a couple of times Water only Cleaned after each use 100oz Crux LR reservoir (2.84l) 12 liters of gear storage 800 gram weight Airfoil back panel Magnetic Tube Trap Stabilizing load-bearing hip belts with cargo Dual reservoir compression straps Rain cover Built-in helmet carry hooks Separate zippered compartment with gear organizer and tool roll Additional top zippered pocket with microfleece lining Overflow storage via two sets of compression straps Reflective accents