The Dakine Syncline 12L Hydration Backpack is sized for everyday riding. The 12-liter pack has just the right amount of storage space for essential tools, snacks and layers plus a lumbar reservoir that keeps the load low and stable. Dakine's proven Air Flow backpanel and shoulder strap designs deliver breathable comfort. Dakine Syncline 12L Hydration Backpack Features 3L / 100oz Hydrapak® lumbar reservoir w/ quick disconnect High-flow Blaster bite valve w/shut-off Magnetic hydration hose clip Breathable Air Flow backpanel and shoulder straps DK Impact CE-certified Spine protector compatible (not included) Front helmet attachment loops Deployable armor carry straps Fleece lined sunglass pocket Mesh side pocket Internal organizer pockets Safety light attachment Integrated rescue whistle Dakine Syncline 12L Hydration Backpack Materials 732 cubic inches (12L) 20 x 9 x 6 (51 x 23 x 15cm) 1.3 lbs. (.6kg) 200D bluesign® approved nylon ripstop (Solids) 600D bluesign® approved Polyester (Prints)