3M Peltor Optime 101 over-the-head earmuffs feature a stainless steel headband for consistent force and effective hearing protection. For noise levels up to 101 dBA, these over-the-head earmuffs provide effective hearing protection.Stainless steel headband distributes weight for low-pressure fit. Ear cup pivot points tilt for comfort that adjusts to individual wearers. Liquid/foam filled earmuff cushions. Color-coding for compliance sighting.Noise Reduction Rating (NRR)*: 27dB. CSA Class A.