Description: External USB interface design,comes with a USB data cable for easy charging. High-capacity main bag + compartment bag, the main bag can be put Apple notebook, iPad, umbrella, wallet, cell phones and other items, vice bag can put towels, cards and other small items, convenient and practical. Wear-resistant, water repellent fabric, fine polyester fabric, feel thick, high density, wet by the rain, you can immediately wipe. S-type decompression shoulder strap design, ergonomic, to create a comfortable experience. Business casual style, owner of high-end fashion atmosphere. Specification: Material: Nylon Size:45x28x10cm Suitable computer size: 15.6 inches For the crowd: students and office workers Package Includes: 1 PiecexBackpack 1 PiecexUSB Cable