3M™ Model 3000 Earmuffs

•These lightweight earmuffs may be worn over-the-head, behind-the-head or under-the-chin •Large ear cup openings and soft, foam-filled cushions offer a snug, comfortable fit •Durable, lightweight construction of non-conductive, dielectric plastic •Noise Reduction Rating* NRR 25 dB (CSA class A) when the band is worn over-the-head. NRR 26 dB (CSA Class AL) when the band is worn under-the-chin. NRR 26 dB (CSA Class AL) when band is worn behind-the-head