|Jansport Superbreak School Backpack Boasting a sturdy 600-denier polyester construction and a stylish exterior, the JanSport SuperBreak backpack easily and comfortably carries your gear for years to come. The utilitarian pack offers a single main compartment and a front pocket with an organizer, giving it enough space to store two to three textbooks, a large binder, two to three spiral notebooks, several paperbacks, a calculator, pens and pencils, a bag lunch, a cell phone, and an MP3 player-all without breaking a sweat. In addition, the SuperBreak is comfortable enough for a full day of striding from class to class, with straight-cut, padded shoulder straps and a 2/3-padded back panel for cushioning comfort. Also outfitted with a web haul loop along the top. Specifications: Capacity: 1,551.2 cubic inches / 25.42 liters.