3M™ E-A-RSoft Metal Detectable Earplugs, 311-4106, yellow, corded

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"Test compatible with 3M™ E-A-Rfit Validation System Noise Reduction Rating (NRR)*: 32 dB. CSA Class AL Compatible with the 3M™ E-A-Rfit™ Validation System Available with and without cords Available in two sizes-regular and large Features a Noise Reduction Rating (NRR)* of 33 dB for regular and large size in combination; 32 dB for regular size alone CSA Class AL *U.S. EPA specifies the NRR as the measure of hearing protector noise reduction. However, 3M makes no warranties as to the suitability of the NRR for this purpose. 3M strongly recommends personal fit testing of hearing protectors. Research suggests that users may receive less noise reduction than indicated by the attenuation label value(s) on the packaging due to variation in fit, fitting skill, and motivation of the user. Refer to applicable regulations or guidance on how to adjust attenuation label values. It is recommended that the NRR be reduced by 50% to better estimate typical protection."