Backpack Information-Size: 11.4x 5.1 x 18 inches (29x 13x 46cm)-Ergonomic design: The adjustable ring-type adjustable buckle is used to freely adjust the length of the shoulder strap, reduce the weight burden, effectively protect the back and shoulders, and make your life more comfortable.-High-quality material: Made of polyester fabric that is easy to clean and very durable. The zinc alloy zipper has undergone 500 repeated tensile tests to ensure the safety and durability of daily use.-Large capacity: easy to carry notepads, card readers and a pile of other items, pens and pencils. There are separate pockets inside, which are convenient for carrying a laptop, and there are two pockets on each side for storing water bottles, umbrellas and other items.-Applicable occasions: suitable for school backpacks, daily use, short trips, etc. A large backpack suitable for school, work, sports, travel, hiking, shopping, camping or other outdoor activities.-Product warranty: If you have any questions, please feel free to contact us-Suitable for teenagers, men and women.Suitable for school and outdoor use.In terms of durability, it has anti-shrink and stretch properties. It also has wrinkle resistance.The backpack strengthens the bottom. This can ensure that the bottom of the backpack is firm and strengthen the protection of the backpack.Please note that due to the light and your computer screen, a slight chromatic aberration should be acceptable