The Campus 25 liter follows the lead of popular Campus 33 liter back-to-school backpack with a slightly smaller volume-great for smaller students or smaller workloads. Packed with all the same features including a large top compartment with a padded laptop sleeve and room for books and binders, a fleece lined sunglass pocket, a slim organizer pocket, and a handy insulated pocket to keep lunch and snacks cool. Padded shoulder straps and an adjustable sternum strap ensure a perfect fit. Go forth and learn! 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, 300D polyester, insulated cooler pocket, organizer pocket, fleece lined sunglass pocket, mesh side pockets, adjustable sternum strap, limited lifetime warranty. Dimensions: 1500 cubic inches (25 liters), 18.5'' x 12'' x 9'' (47 x 31 x 23cm). Material: Polyester.