3M™ PELTOR™ Optime™ 98 is versatile, over-the-head earmuffs featuring a stainless steel headband for consistent force and effective hearing protection. A versatile, over-the-head earmuffs featuring a stainless steel headband for consistent force and effective hearing protection For noise levels up to 98 dBA. 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) - 25 dB. CSA class A. The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50% for estimating the amount of noise reduction provided. 3M is leading the advancement of hearing conservation™.