Flents Protechs, Super Sleep, Foam Ear Plugs, 10 Pair + Case

Noise Reduction Rating - NRR 29  Decibels (when used as directed)Smooth Foam for a Soft, Comfortable FitInformation Required By EPA: The level of noise entering a person's ear, when a hearing protector is worn as directed, is closely approximated by the difference between the A-weighted environmental noise level and the NRR. Example: The environmental noise level as measured at the ear is 92 dBA.The NRR is 29 decibels (dB).The level of noise entering the ear is approximately equal to [92 dB[A] - 29] 63 dB(A).The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (Higher numbers denote greater effectiveness).