OEM Sperian Howard Leight Leightning L3H Capmount Earcups designed for high performance and durability. The steel-wire construction ensures robust reliability, while the Air Flow Control feature provides optimal attenuation across all frequencies. A nonwoven layer manages air flow, controlling how sound reaches the ear for enhanced comfort. The snap-in ear cushions allow for quick and easy replacement. With a Noise Reduction Rating (NRR) of 27, these earcups offer a high level of protection.