3M Peltor Optime 98 Over the Head Earmuff, Hearing Protection, Ear Protectors, NRR 26 dB, Ideal for heavy equipment operations 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): 26 dB CSA Class A Noise Reduction Rating of 25 dB Lightweight headband for user comfort Dual low-pressure bands improve comfort Broad foam cushions provide low surface pressure Pivoting ear cups for ideal fit