Howard Leight Ear Muffs are designed for prolonged use. Three-position, ultra-lightweight earmuff weighs 6 oz. and provides excellent protection for most environments. Design includes high-visibility red cups and a black band. Included adjustable crown strap offers a secure fit when worn behind the head or under the chin. NRR 25 ear muffs are tested to ANSI S3.19-1974.