3M™ PELTOR™ Optime™ II Helmet-Mount Headset H520P3EA-410-GQFeatures3M™ PELTOR™ Optime™ II Banded Headsets are innovative, helmet-mountable hearing protectors designed for use in noisy, harsh environments such as airports and construction sites. They reduce noise levels by up to 30 dB. These banded headsets are filled with a unique combination of liquid and foam, providing comfort during extended use, and also enhance wear resistance and comfort.