Fashionable USB Rechargeable Backpack Computer BagProduct information: Material: Nylon Opening method: zipper With or without inner liner: Yes Internal structure of the bag: zippered hidden bag, mobile phone bag, ID bag, sandwich zipper bag, computer insertion bag, camera insertion bag Function: breathable, waterproof, wear resistant, anti theft, shockproof, and load reducing Applicable product type: Notebook Lining texture: polyester cotton Number of shoulder straps: double Color: Blue, Pink, Khaki,