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Thunder ear muffs offer dielectric construction to withstand use and abuse in all workplaces, especially electrical environments. Patented, air-flow control delivers optimal attenuation across all frequencies, without increasing earcup size or weight. A patented baseplate chamber and high-tech nonwoven layer manage the flow of air inside the earmuff to control how sound reaches the ear. The result is better, more consistent, overall attenuation for virtually all industrial noise environments. Unique dual-headband offers better positioning and breathability for all head sizes. Nondeforming outer headband minimizes pressure. Quick-Click height adjustment remains fixed during wear. Snap-in ear cushions allow easy maintenance.