ABRASION-PROOF,WATERPROOF: The backpack is made of durable, waterproof Oxford fiber, light weight, wear-resistant,durable,Parents no longer have to worry about their children's textbooks being wet by the rain COMFORTABLE AND PRACTICAL: Children's backpack is ergonomic. Adjustable padded shoulder straps take the strain off the neck and shoulders. The breathable material on the back makes the backpack teenager comfortable to wear and does not sweat when it is worn for a long time. The fashionable pattern of shark schoolbag looks very cool and cute CHARACTERISTIC: The leisure backpack has a built-in USB charging port and a built-in charging cable. You need your own mobile power supply and USB cable to charge and enjoy convenient charging effect. When listening to audio, music, etc., the headphone jack can release both hands.