Harry Potter: Up To No Good Quilted Black Backpack from Blue Sky. 

Perfect for any aspiring Witch or Wizard, this luxury Quilted Harry Potter Backpack allows you to carry your Hogwarts essentials without the appearance of being overloaded. To show off your allegiance to Hogwarts, this officially licensed backpack comes with a beautiful gold tone metal Hogwarts crest on the front, and the words 'I solemnly swear that I am up to no good' printed at the top.

Officially Licensed by Warner Bros.