Get psyched on Drafter 18L Backpack whether you bike mountains, cycle sidewalks, or ride sandstone. If your bag gets dirty, Dakine recommend hand washing with mild soap (like Nikwax Tech Wash), cold water and a soft bristle brush. If hand washing is not going to do the trick, use a front loader washing machine. To ensure your backpack doesn't get tangled, place inside a pillowcase or mesh bag before washing. Always use cold water, mild soap and run on a gentle cycle. Never bleach your pack. Hang to dry in a warm but shady place, ensuring both inside and out are dry before storing. Details: 400D nylon ripstop, 3L / 100oz Hydrapak lumbar reservoir with quick disconnect, high-flow blaster bite valve with shut-off, air suspension backpanel, DK impact CE-certified spine protector compatible (not included), breathable ergonomic shoulder straps, full face or trail helmet carry, deployable armor carry straps, quick stash zippered side pocket, fleece lined sunglass, phone pocket, internal organizer pockets, magnetic hydration hose clip, reflective logo, limited lifetime warranty. Dimensions: 1098 cubic inches (18 liters), 19'' x 13'' x 9.5'' (48 x 33 x 24cm), 2.8 lbs. (1.2kg). Material: Nylon.