Material： Durable waterproof nylon (but not completely waterproof), effective protection for notebooks and other items inside the bag from light rain. Polyester lining, back cushioning cotton, smooth and sturdy zipper.Comfortable and well-designed: Designed with a zipper pocket on the back and anti-theft design to ensure safety, you can store your cell phone, wallet and other important items. The back design a trolley case fixed belt, can free both shoulders.Size: School Backpack: 12.2 "Lx5.9 "Dx18.5 "H; 1 padded laptop pocket for 15-inch laptop; Weight: approx.:250gStructure: Interior - Main compartment contains 1 zippered pocket, 1 laptop compartment. 2 side pockets for water bottles and umbrellas, 1front zippered pockets for easy access to essentials, 2 small front pockets, you can put rechargeable batteries and other items, and a back zippered pocket Fashionable and chic: exquisite and fashionable print pattern, no color loss, no odor, environmental protection and health. It is suitable for student use, daily leisure or travel for all types of occasions. Ideal fashion gift - Thanksgiving/New Year/Birthday/Valentine's Day gift