Internal structure of the bag: ID bag, mobile phone bag, zipper pocket, computer pocket Opening method: zipper Material: Oxford cloth Whether with a lock: yes Function: waterproof, breathable, wear-resistant, anti-theft, burden reduction, earthquake resistance Processing method: printing Style: Business Lining texture: polyester Strap root number: double root Lifting parts: soft handle Type of outer bag: inner patch bag Carrying system: curved shoulder strap