The Dakine Manual 20L Backpack is a big time pick with all the pieces you need. Multiple compartments, adjustable shoulder straps and Dakine detailing throughout. 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: 600D polyester, 600D recycled PET, skateboard carry straps, zippered front pocket, limited lifetime warranty. Dimensions: 1205 cubic inches (20 liters), 19.5'' x 12'' x 6'' (50 x 30 x 15cm). Material: Polyester.