Ultra-lightweight for prolonged usage—excellent protection for most environments. QM24+ (NRR 25) is a three-position, ultra-lightweight earmuff. Weighs only 6.7 oz. for comfort during prolonged usage. The high visibility red cups and black band add style to an extremely functional earmuff. Supplied with an adjustable crown strap for a secure fit when worn behind the head or under the chin. The QM24+ is a good choice for compliance with noise reduction regulations at work, or as an inexpensive option for home use. Our Bilsom L3 and Peltor H7A are at the other end of the scale when it comes to comfort, with a metal headband that offers softer pressure against the head.