18" Backpack with Buckle System - UPDATED Spring 2013! * Product Material: Nylon * Product Weight: 3 lbs. * Laptop Compartment Dimensions: 15.6" x 11.5" x 1.5" * Organizer in front pocket * Side buckle system * Accessory side zippered pocket * Self-repairing excel zippers * Laptop compartment 15.6" * Accessory side zipped pocket * Side buckle system * Organizer front pocket