Description For noise levels up to 95 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)*: 21dB. CSA Class B 3M™ Peltor™ Optime™ 95 behind-the-head earmuffs feature low-profile earcups that fit well with most helmets, eyewear and other safety equipment. Provides effective hearing protection against high-frequency noise.