3M Tekk Protection Professional Earmuff, used to help protect ears against noises exceeding 85 decibels, offers excellent fit, comfort and hearing protection. 3M Tekk Protection Professional Earmuff features a steel-wire padded headband that is fully adjustable for a customized, snug fit. The twin-cup is a patented design provides high attenuating hearing protection. Featuring a Noise Reduction Rating (NRR) of 30 decibels, 3M Tekk Protection Professional Earmuff are a great choice in hearing protection for both the pro and DIYer.