Howard Leight by Honeywell Earmuffs, Cap Mount, Series: Leightning L3H, 26 dB Noise Reduction, White, ABS, Specifications Met: ANSI S3.19, EN 352-3, Z94.2, EPA Certified, CSA Certified.The Howard Leight by Honeywell Leight cap mounted earmuffs are a unified solution to work with North by Honeywell hard hats and face shields. The Leightning L3H earmuff is specifically engineered to seamlessly integrate with full brim hard hats to provide an effective unit for workers head and hearing protection.