Invisible thread is very thin monofilament thread used by magicians to make small, lightweight objects seem to levitate and animate. It is usually made from nylon which has been separated into individual strands. A famous illusion is the Floating Bill.
Stronger invisible threads can levitate heavier objects such as people and elephants.
Invisible thread is available in stripped or unstripped form. In an unstripped form the thread when bought actually a cluster of invisible threads and has to be separated (stripped) to be used in a performance.
The Invisible Thread Reel was Invented by James B. George in 1992 and continues to be one of the hottest selling Magic Tricks of all time. Avoid pirate knock-offs of his invention by purchasing directly from him at ITRMagicTricks.com