Fox 40 Epik Black Referee Whistle. The Fox 40® EPIK™ has an integrated black over-molded Cushioned Mouth Grip (CMG®). Integrated grip ribs along the top surface of the whistle provides additional holding option. Ergonomically designed shape to fit your hand better. Ring has sleek black zinc finish. Easy to blow, optimized performance. Flawless, consistent and reliable. Sound will be heard up to a mile away.