For noise levels up to 98 dBA Universal mounting attachment fits most hard hats Earcup pivot points tilt for optimum comfort and efficiency Ultra light with liquid/foam filled earmuff cushions Noise Reduction Rating (NRR)*: 23 dB. CSA Class A 3M Peltor Optime 98 cap-mount earmuffs feature a universal mounting attachment that fits most hard hats. A versatile, cap-mount earmuff. For noise levels up to 98 dBA. Universal mounting attachment fits most hard hats Earcup pivot points tilt for optimum comfort and efficiency. Ultra light with liquid/foam filled earmuff cushions. Color-coding for compliance sighting. Noise Reduction Rating (NRR)*: 23 dB. CSA Class A. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided. 3M is Leading the Advancement of Hearing Conservation.
