A three-position muff that can be worn over the head, behind the head, or under the chin. The Model 3000 includes the crown strap required for under the chin and behind the head wear. The light-weight, durable plastic construction is non-conductive, dielectric for tough environments. The large earcup openings with soft, foam-filled cushions provide excellent protection and comfort. The replaceable foam cup liners and take-apart assembly make cleaning easy and offer longer muff life. ANSI S3. 19-1947/CSA Z94.2.