"Product Description: 1, a waterproof, durable multi-functional leisure computer backpack with data cable and USB charging function, external USB charging, convenient and practical. 2, two-step charging, internal power supply, external data cable, can be charged at any time, in line with modern living habits, The package comes with a mobile power cable, buyers need to provide their own power supply. 3. waterproof material, using splash-proof fabric, not afraid of rain, will automatically slide off when encountered with raindrops. 4. Wear-resistant and non-slip, made of high-density high-quality nylon fabric, the fabric is comfortable and soft, and the surface is not easy to wear. 5. Shoulder straps are comfortable and breathable, reducing pressure. Ergonomic design, three-dimensional shoulder straps, breathable and comfortable, reduce fatigue. 6. luggage trolley straps, back strap, can fix the backpack on the luggage. 7. Large capacity, can hold 15.6 laptop, 9.7 iPad, mobile phone, wallet, headphones, umbrella, mug, keys and other items. 8. Reasonable storage levels, 15.6' laptop separate compartment, can protect the computer without fear of bumping, vertical zip pocket, main pocket, 2 side pockets."