★ ★ ★ Zipper Improvement Version ★ ★ ★. High grade material: It is made of special nylon fabric with water resistance, scratch resistance, tear resistant and breathable, wear resistant microfiber synthetic leather. Since high density waterproof cover is attached, double waterproofing can be realized. <br> • External USB port: The power bank housed in the backpack can charge your smartphone via this external USB port. I will release my hands. <br> • Unique features: You can safely store your valuables in a hidden anti-theft pocket. Using the luggage belt, you can secure the backpack to the suitcase. You can easily move out by pulling out the suitcase with one hand. In addition, the back of the backpack is made of a breathable, sweat-resistant sponge mesh. <br> • Exquisite design: microfiber synthetic leather and metal logo - a business-like appearance; two side pockets can be stored such as water bottles and umbrellas. <br> • Large capacity: Large capacity internal space can store up to 15.6 inches of laptop and is convenient to carry. Appearance Dimensions: 47 * 31 * 17 cm / 18.5 * 12.2 * 6.7 inch