Compatibility: For manufacturing plant, construction site, airport, operating heavy machinery, shooting, or hunting. Ear Production: Earmuffs are built with specifically formulated layers of high-density, noise-dampening acoustic foam for an excellent Noise Reduction Rate (NRR) of 30dB, reducing exposure to hazardous levels of noise. Comfortable Design: Their lightweight, low profile design and soft earcup material provide ultimate comfort and practicality, making these earmuffs an excellent choice for extended wear. Good Quality: Strong construction for a trustworthy protection that was built to last.