Exclusive iridescent or camo color and sleek, curvy shape for a look that workers will want to wear. The SoftCoat® covering on the cups and yoke helps to muffle transmitted noise. The M1 Premium Earmuff features a black-chrome, spring-steel headband that resists fatigue and is more durable. It maintains stability and doesn’t twist out of shape like other wire-band earmuffs. Six different adjustment points provide a custom and comfortable fit for most head sizes. Earmuff Hygiene Kit for M1, M2, M3 and Z2 (includes replacement ear cushions and cup foam). NRR 29. Independently tested to ANSI S3.19-1974.