M1 Premium EarmuffsBlack-chrome, spring steel headband resists fatigue and is more durable. Exclusive iridescent color and curvy shape for great looks. Six different adjustment points provide a custom and comfortable fit for most head sizes. SoftCoat® covering on cups and yoke helps muffle sound transmission. Color: Exclusive Iridescent Color; Noise Reduction Rate (NRR): 29 dB; Weight: 1.40 lb.