The lightweight over-the-head earmuff features a stainless steel headband for consistent force and effective hearing protection. For noise levels up to 95 dBA. - Stainless steel construction resists bending and warping. - Earcup pivot points tilt for optimum comfort and efficiency. - Lightweight with liquid/foam filled earmuff cushions. - Color-coding for compliance sighting. - Noise Reduction Rating (NRR): 21 dB. CSA Class B. *The NRR may overestimate the hearing protection provided during typical use. 3M recommends reducing the NRR by 50 percent for estimating the amount of noise reduction provided. 3M is Leading the Advancement of Hearing Conservation.