DAKINE. 08130057-BK. CAMPUS 33L BACKPACK. BLACK. The tried-and-true Campus 33L gets a passing grade as the ultimate back-to-school backpack. This roomy 33-liter backpack features four distinct compartments including a large top compartment with a padded laptop sleeve and room for books and binders a top fleece lined sunglass pocket a slim organizer pocket and a handy insulated cooler pocket for lunch and snacks.