3M™ Peltor™ Hi-Vis, Over-the-Head earmuffs features bright orange colored earcups for added visibility. 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)*: 23 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.