Specifications: Size: 55 x 30 x 20cm Comfortable back system for backing Material: mini rip-stop PU/600D polyester + 210D PU liner Remark: a main compartment with large capacity Two side pockets The cover with adjustable strip and plastic buckles Webbing handle Special air-channel back system compatible For backing Well and high quality control Customers' designs and logos are welcomed Small orders are acceptable ODM/OEM is accepted