3M Peltor Optime 105 RedBlack Cap Mount Earmuffs with 27 dB NRR feature double-shell technology to provide effective hearing protection. They have proprietary Twin-Cup design and can take the noise levels up to 105 dBA. Earmuffs with liquidfoam filled cushions are color-coded to help match attenuation needs. Cap mount design makes them easy to design. Earmuffs have an ear cup whose pivot points tilt for optimum comfort and efficiency. They are developed to provide ultimate protection in the most demanding noise environments.