3M™ Peltor™ Optime™ 98 is 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. 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.