LASER-LITE™ (NRR 32)Ear Plugs are the multi-color ear plug that workers love to use. The non-irritating, non- allergenic self- adjusting foam recovers to fit virtually any ear canal. LASER-LITE™Ear Plugs are ideal for that portion of the population with smaller ear canals. Attenuation tested in accordance with ANSI S3.19- 1974. Noise reduction rating NRR 32 dB, SNR 35 dB.