3M™ Peltor™ Optime™ 95 cap-mount earmuffs feature a universal mounting attachment that fits most hard hats. Benefits •Universal mounting attachment fits most hard hats •Stainless steel construction resists bending and warping. •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)*: 21 dB. CSA Class B.