The 3M™ Peltor™ Cap-Mount Earmuffs are 3M's latest advancement in hearing conversation. With groundbreaking comfort, design, and technology - this will be your newest favorite type of cap-mount ear muff. The earmuffs utilize a newly designed spacer, foam liners, and ear cushions to improve attenuation. The lightweight, lower-profile earmuff helps with compatibility with other important protective equipment. The earmuffs contain a universal mounting attachment that fits most hard hats and the stainless steel band construction resists bending and warping. You won't need to worry about not having consistent and constant pressure over prolonged wearing periods. Earcup pivot points tilt for optimum comfort. NRR (Noise Reduction Rating): 25dB, 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.