3M Peltor BlackChartreuse Over-The-Head Earmuffs with 27 dB NRR feature low profile and are lightweight by nature while are structured to protect against moderate-to-high level industrial noise and other loud sounds. Earmuffs feature electrically insulated wire headband referred as dielectric that offers steady pressure over prolonged wearing periods and are an improvised advancement in hearing conservation. They incorporate convenience, design and protection while consists ear cup pivot points that tilt for flawless comfort and efficiency. Earmuffs have replaceable ear cushions and foam liners while the metal components of the headband has been enclosed by non-conductive material for use in a low voltage electrical hazard.