Check the listing for details. Protechs, Work Ear Plugs, 8 Pair with Case. Condition: New. Listed at 4.48 USD. Noise Reduction Rating - 33 Decibels Foam Ear Plugs The Highest Independently Tested NRR Tapered for an Easy, Snug Comfortable Seal. 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: (1) The environmental noise level as measured at the ear is 92 dBA. (2) The NRR is 33 decibels (dB). (3) The level of noise entering the ear is approximately equal to [92 dB(A) - 33] 59 db. The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (higher numbers denote greater effectiveness). Noise reduction rating: 33 Decibels (when used as directed) Our eBay Store About Us Contact Us Add to Favorite Sellers Expiration Date: 07/25/2027 Disclaimer: Our receiving department does its best to verify and then enter the correct expiration dates for all incoming products. However, discrepancies do occur from time to time. This being said, the exceptionally high turnover at iHerb ensures that our inventory is among the freshest in the industry. Flents, Protechs, Work Ear Plugs, 8 Pair with Case DESCRIPTION: Noise Reduction Rating - 33 Decibels Foam Ear Plugs The Highest Independently Tested NRR Tapered for an Easy, Snug Comfortable Seal. 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: (1) The environmental noise level as measured at the ear is 92 dBA. (2) The NRR is 33 decibels (dB). (3) The level of noise entering the ear is approximately equal to [92 dB(A) - 33] 59 db. The range of noise reduction ratings for existing hearing protectors is approximately 0 to 30 (higher numbers denote greater effectiveness). Noise reduction rating: 33 Decibels (when used as directed) SUGGESTED USE: With clean hands, slowly roll plug into a thin, crease-free cylinder.While compressed, insert plug into ear canal. Fitting is easier if outer ear is pulled outward and upward during insertion.With fingertips, hold plug in place until it begins to expand and block noise. The degree of noise reduction depends upon proper insertion. INGREDIENTS: WARNINGS: Do not cut ear plugs. Inspect product before use and replace plugs if they are damaged or show signs of wear. Not for prolonged use. Product intended for single user only. Keep ear plugs away from infants and small children as they may get caught in the windpipe and create a choking hazard. If you should experience pain or discomfort when using this product, please discontinue use. For noise environments dominated by frequencies below 500 Hz the C-weighted environmental noise level should be used. Improper fit of this device will reduce its effectiveness in attenuating noise. Consult the enclosed instructions for proper fit. Although hearing protectors can be recommended for protection against the harmful effects of impulsive noise, the Noise Reduction Rating (NRR) is based on the attenuation of continuous noise and may not be an accurate indicator of the protection attainable against impulsive noise such as gunfire. Extended exposure to any noise above 85 decibels can cause gradual hearing loss.