The Fox 40 Protective Pouch is designed to protect the user and others in close vicinity from droplets while still maximizing sound power. Manufactured using 100% moisture resistant polyester fabric to seal around the Cushioned Mouth Grip of your Fox 40 whistle so it will not block the chambers.   The Pouch is best used with a Fox 40 Classic CMG or Fox 40 Fuziun:  Reducing output by only 1.5 dB, which is hard to detect by the human ear.  Comes with an elastic loop to connect your lanyard and can also be used handheld.