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. Size: School Backpack: 12.2 "Lx5.9 "Dx18.5 "H; 1 padded laptop pocket for 15-inch laptop; Weight: approx. 1.54 lbs. 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.