The Bilsom Clarity ear muff offers sound management technology which uses patented passive and electronic technologies that block out noise while allowing alarms, warnings, and even co-workers' voices to be heard more naturally. Does not isolate worker from environment, improves overall safety especially where communication is critical. Dielectric construction suitable for all workplaces, especially electrical environments. Uniform headband pressure for all head sizes, providing better comfort for long-term wear. Inner-ventilated headband minimizes pressure on the head, breathes easier in warm/humid conditions. Non-deforming outer headband withstands rough treatment in the toughest workplaces. Quick-Click height adjustment remains fixed during wear. Snap-in ear cushions make replacement quick and easy. NRR 23.