ADVANCED MATERIALS: Made of high-density oxford fabric, waterproof and wear-resistant. Breathable and decompression carrying system, heat dissipation, ventilation, shock absorption. It's more comfortable carrying a heavy load, relieves the stress of your shoulder. Offering your back plenty of cushioned comfort. PRACTICAL SAFE: Main compartment of the anti theft backpack with lockable zipper design,convenient for locking your valuables. Hidden anti-theft pocket on the back of this business backpack, protects your items from thieves. The surface of the package is printed with reflective design, and the night warning is safe Multiple storage areas: Size: 17cm x 8cm x 34cm, large-capacity main pocket, zipper pocket, internal patch pocket, back zipper pocket, shoulder strap card pocket, side pockets, making it easier and safer to store small items. Large capacity can meet your storage needs. MULTI-FUNCTIONAL : Stylish, Unisex and Effective. Can be used shoulder bag / cross body backpack / casual day pack / sling bag / chest bag / travel bag / working or business bag, suitable for office, school, outdoor, business and other occasions