Amazon.com | Topo Designs Global Travel Bag – 30L or 40L 。Built with recycled nylons C0 durable water repellent (DWR) 3-way carry—backpack straps, shoulder strap and grab handles Stowable, contoured, padded spacer mesh shoulder straps Foam structure with padded, recycled ballistic nylon back panel U-shape entry to large main compartment Internal mesh organization pockets U-shape entry to secondary organization compartment Larger, zippered security pocket and dual slip pockets Vertical, exterior zippered pocket with dual security pockets Easy access to back panel laptop compartment; fits most 15 in. laptops Load-lifter straps and sternum strap Removable waist belt Pass-through panel secures the bag to the handle of your rolling luggage Expandable side water bottle pockets Vertical daisy chain webbing Heavy-duty, YKK zippers with security loop on main compartment PackFast™ attachment clips GLOBAL TRAVEL BAG 30L DEETS: 1000D recycled nylon, 400D recycled nylon, 210D recycled nylon, 1680D recycled ballistic nylon construction, 20 x 12.5 x 7 inch dimensions, 30-35L volume fully packed