3M Peltor Optime(TM) 105 Over the Head Earmuff Hearing Conservation. For noise levels up to 105 dBA, these over-the-head earmuffs feature double-shell technology to provide effective hearing protection. Proprietary Twin-Cup(TM) design has soft, foam-filled earmuffs. Stainless steel headband distributes weight for low-pressure fit. Earcup pivot points that tilt for optimum comfort and efficiency. Liquid/foam filled earmuff cushions. Color-coding to help match attenuation needs. Noise Reduction Rating (NRR)*: 30 dB. CSA Class AL
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