Elastic expansion bands flex slightly to handle bulky loads High-capacity unstructured compartment gives you greater flexibility Multi-purpose side pockets make it easy to carry water bottles and more Padded backpack straps plus the ACA recognized Contour System with Contour Lumbar Support increase comfort and reduce fatigue Zippered front pocket gives quick access to tickets, keys, whatever Water and stain resistant materials add durability Natural canvas material styled for work, travel or play Padding: DropShield padding for notebook protection Endorsement: Exclusively endorsed by the American Chiropractic Association (ACA) Interior: Fits most notebooks up to 15.4"