Abstract: An anti-theft device in the form of a cage created from high security steel cable for use with a motorcycle helmet to secure the helmet to a motorcycle in order to prevent the helmet from being stolen when the helmet is not in use. The cage opens via a draw string type opening to capture the helmet therein and closes to prevent the helmet from being removed from the cage. A closure cable forms the draw string type closure for the cage and has a closure cable loop at each of its free ends so that the closure cable can be wrapped around the motorcycle and the ends secured together with a standard lock to secure the device and the captured helmet to the motorcycle. The device can be folded to store in a small storage space when not in use and the cable may be plastic coated or uncoated.