The Otis backpack takes after the Frankie pack with even more volume. This travel or school pack sits upright on the padded bottom panel ready to be loaded up with a laptop in the padded compartment, books or travel necessities in the roomy main compartments and all your accessories organized and at your fingertips in the zippered front compartment plus a fleece-lined pocket for your sunglasses. You'll never have to leave anything behind with this comfortable roomy pack. Details: Fits most 15'' laptops, adjustable sternum strap, fleece lined sunglass pocket, organizer pocket, water bottle slip pocket, padded bottom panel, limited lifetime warranty. 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. Dimensions: 1830 cubic inches (30 liters), 19'' x 9.5'' x 9'' (48 x 24 x 23cm). Material: Polyester.