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, delivering 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. Non-deforming outer headband withstands rough treatment in the toughest workplaces. Material(s): ABS Plastic; Noise Reduction Rate (NRR): 29 dB.