Timbuk2 Parkside Laptop Backpack 600D Ripstop Lite Polyester Imported Front zip pocket for keeping small items in check Elasticized external side pocket for water bottle or U-lock Custom-fit strap design for a truer, more comfortable fit Pockets: 3 interior slip, 4 exterior Front zip pocket for small bits. Internal organizer for pens, phones, and other small stuff. Secure zip pocket for cables, earbuds, stylus, cards, cash, etc. Custom-fit strap design for a truer, more comfortable fit. On-strap bottle opener for party tricks and quick refreshment. Vista loop for attaching blinky bike lights. Large main compartment fits books, lunch, and a light jacket.