Item from harry-potter-chamber-of-secrets by
Harry's Invisibility Cloak, inherited from his father -- essential this year for sneaking into the Restricted Section, hiding in Hagrid's hut during the arrest, and the dozen other rule violations that keep Harry alive.
The Cloak is Harry's most useful tool this year. He and Ron hide under it in Hagrid's hut when Cornelius Fudge and Lucius Malfoy arrive to arrest Hagrid and remove Dumbledore. They use it to sneak into the Forbidden Forest following the spiders. They wear it through corridors past teachers enforcing the new escort rules. The Cloak makes every act of defiance possible -- every investigation, every rule broken in pursuit of the truth. Without it, Harry and Ron would have been caught a dozen times over. Dumbledore returned it to Harry in his first year with a note: 'Use it well.' Harry has.
A large, flowing cloak of silvery, shimmering fabric that feels like water woven into material. When draped over someone, it renders them completely invisible. It folds small enough to fit in a pocket.
Also known as: the Invisibility Cloak, Invisibility Cloak, the Cloak, Harry's cloak