Flents Protechs, Quiet Quick Foam Ear Plugs, 5 Pair + Case

Noise Reduction Rating NRR 30Smooth, Tapered Foam for A Soft, Comfortable FitTapered for Comfortable FitNot Made with Natural Rubber LatexNoise Reduction Rating: 30 decibels (when used as directed).The range of noise reduction ratings for existing Hearing protectors is approximately 0 to 30 (higher numbers denote greater effectiveness)Information 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 30 decibels (dB). The level of noise entering the ear is approximately equal to [92 dB(A) - 30] 62 dB(A).