3M 7000009665 is an over-the-head earmuff that provides excellent hearing protection with an attenuation rating of 30.0 decibels. It is designed in the shape of earmuffs and is not metal detectable. With CSA Class AL certification, it offers reliable performance. Although it is not electrically insulated or dielectric, it does come with noise attenuating headsets. With no cord and no Bluetooth option, it is not moisture resistant. This high-quality earmuff is part of 3M's reliable product lineup.