Get psyched on Amp 12L Hydration Pack whether you bike mountains, cycle sidewalks, or ride sandstone. Dakine designed the Amp with an air mesh suspended back panel, an ergonomic waist belt, and breathable shoulder straps for the utmost comfort in warmer weather. 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: 200D nylon, 3L/100oz Hydrapak reservoir with quick disconnect, high-flow blaster bite valve with shut-off, air mesh suspended backpanel, breathable ergonomic shoulder straps, deployable helmet carry, quick stash side pockets, fleece-lined sunglass pocket, internal organizer pockets, magnetic hydration hose clip, reflective logo, limited lifetime warranty. Dimensions: 700 cubic inches (12 liters), 18'' x 10.5'' x 6.5'' (46 x 27 x 17cm). Material: Nylon.