SKV BLB21282 Men Business Duty Traveling Double Shoulder Bag Lightweight Large Capacity Laptop Backpack(Black)1. Material: oxford cloth 2. Back trolley strap design, travel free hands 3. Reflective strip design, safer for traveling at night 4. Curved metal handle, in line with the human body hand shape, comfortable to grip without strangling the hand 5. Thickened and breathable shoulder straps, scientific load reduction 6. Bi directional zipper, feel thick and durable, smooth and smooth not stuck teeth 7. External USB charging interface, plug and play 8.