Smart Laptop Backpack, waterproof polyester material, with USB Charging.
Made of polyester, it is a high-strength, abrasion-resistant fabric, so the backpack is antistatic, easy to clean and non-deformable. Features: Choose the comfortable fabrics. Notice: The bag has a built-in charging cable, simply connect the mobile charger to the cable, and the USB connection can be charged.(No power supply.)