Fox 40 Classic Referee Whistle CMG (Cushioned Mouth Grip) with Fox 40 Breakaway Lanyard. This is the one that changed the game! Authentic. Original. Fox 40's first patented pealess whistle. Has a "cushioned mouth grip" for added comfort and safety. Used by referees and coaches at all levels who need every call to be heard. Flawless, consistent and penetrating sound keeps the referee in control of the game. Ensure every call will be heard!