Howard Leight by Honeywell Clarity Series C3 Sound Management Safety Earmuff (1011146) Sound management technology enhances ambient noises such as conversation and alarms while protecting from harmful industrial noise with uniform attenuation Dielectric construction inhibits conduction of electric currents; ideal for electrical environments but suitable for all workplaces Non-deforming outer headband withstands rough treatment; inner headband is ventilated to breathe better in warm or humid environments; uniform headband pressure provides long-wearing comfort Quick-Click height adjustment remains fixed during wear; Snap-in ear cushions are quick and easy to replace Noise Reduction Rating 27; Recommended industries: aviation, farming, construction, lumber, steel, transportation, military/law enforcement, manufacturing, sporting, DIY projects, general contracting