Airsoft Reusable Ear Plug features a shell of soft attenuating material around a pocket of air that is comfortable enough for extended wear. Airsoft is the highest rated reusable ear plug available. Washes with soap and water for months of protection. Attenuation tested in accordance with ANSI S3.19- 1974. Noise reduction rating NRR 27 dB, SNR 30 dB. Blue color.