The FlexVent suspension system, certified by the American Chiropractic Association, has articulated shoulder straps, a rounded back panel, comfortable stitch lines and soft-touch chemise fabric External bungee-compression system with clips offers several options for organization Side bungee cords allow for compression Bottom compression Stand-up design for easier loading and unloading Protective, dedicated 16'' laptop compartment Large main compartment for books and binders Front compartment has internal organization with secure-zip pockets and a padded tablet sleeve External, fleece-lined pocket for sunglasses, phone or keys Two durable water bottle pockets can easily double as multi-use pockets with quick-draw smartphone access on one side 360-degree reflectivity U-pull YKK® zippers are easy to grab Comfortable, padded top grab handle Sternum strap with a whistle buckle Removable waist belt Coated, abrasion-resistant boot fabric Women-specific version available IV5