This backpack is made of waterproof and durable polyester with a metal zipper. Comfortable wide and breathable shoulder straps and plenty of foam pads help relieve shoulder pressure.

Large capacity: an external USB interface, a headphone cable interface, dimensions: 17x 12 x 6.5 inches (43x 30x 7cm). Easy to carry notepads, card readers and a bunch of other items, iPad, diary, pens and pencils, iPhone. There is a separate pocket inside, which is convenient for carrying a laptop, and there is a pocket on each side for easy storage of water bottles, umbrellas and other items.

Suitable for super heavy and heavy backpacks. Suitable for school and outdoor use. In terms of durability, it has anti-shrinkage and tensile properties. Therefore, it also has wrinkle resistance. The backpack strengthens the bottom and high details. This ensures that the bottom of the backpack is firm and strengthened to protect the backpack.

With an external built-in USB charger interface, this USB backpack provides you with a more convenient way to charge while walking. This is a great technology gift from his wife, daughter and son.

After-sales service: If you find any problems after purchasing the product, you can directly contact our factory customer service, we will solve all the problems for you, thank you for your purchase!