Item from Prisoner of Azkaban by J.K. Rowling
Harry's shimmering silvery cloak that renders the wearer completely invisible — essential for sneaking into Hogsmeade, following suspects on the Marauder's Map, and surviving a night with werewolves and Dementors.
Also known as: the Invisibility Cloak, Invisibility Cloak, the Cloak, Harry's cloak