Adventures are messy. If your Dakine bag gets dirty they 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. This lifestyle backpack from Dakine features: Laptop sleeve, fits most 15'' laptops, zippered closure with metal slider, zippered front pocket with metal slider, rope pulls, exterior front organizer pocket with flap closure, toggle detail, padded adjustable shoulder straps, black TPE faceout trims, limited lifetime warranty. Dimensions: 1100 Cubic incheses (18 liters), 16 x 12 x 5'' (41 x 31 x 13cm). Material: Cotton, Canvas.