Multiple-position headband allows wearer to select position over the head, behind the head or under the chin. Alternative to Cap-Mounted earmuffs - wear with hard Hats, face shields, respirators and other PPE. Patented air flow control technology delivers optimal attenuation across all frequencies without increasing earcup Size or weight. Inner-ventilated headband minimizes pressure on the head, breathes easier in Warm/humid climates [V2 and V3 only]. Non-deforming outer headband withstands rough treatment in the toughest workplaces.