Howard Leight Leightning L0N Black Behind Neck Metal NeckBand Noise Blocking Earmuffs with 22 dB NRR feature patented Air Flow Control? technology to provide enhanced attenuation across all frequencies. Steel wire earmuffs offer superior performance and durability with added lasting comfort for daily use. The patented base plate chamber and high-tech non-woven layer of earmuffs manage flow of air to control the sound that reaches ear. L0N features ultraslim, lightweight earcups, ideal for use with welding helmets.