Come and Check Our Branding Solutions.This backpack is made of waterproof Oxford cloth and polyester. The backpack has a large capacity and can meet the needs of 2-3 days travel. It has a USB charging port, earphone hole and keychain, which is very convenient and fashionable. The back of the backpack is equipped with a high-elastic foam pad to absorb shock and reduce pressure, which is very comfortable. This backpack is an ideal choice for promotional gifts. Pls check inventory and detailed info before placing your orders.