What's in the envelope, Harry? That will be up to you when you own this fantastical see-through Harry Potter Hogwarts Clear Backpack with Removable Envelope Pouch! Made of PVC and polyester, it measures about 16-inches tall x 11 1/2-inches wide x 5-inches deep and features zip top and front pockets, a handle, colorful adjustable straps with a Happy Potter theme, and a removable zip-close pouch displaying the Hogwarts emblem. Don't head to the school of magic without it! Wipe clean with a damp cloth.