Thunder series earmuffs are designed with all-day comfort in mind. Thunder headband earmuffs feature a unique dual headband for better positioning and breathability, and a non-deforming outer headband that minimizes pressure on the head. Plus, its dielectric construction withstands use and abuse, while protecting workers in electrical environments. The Thunder series features patented Air Flow Control™ technology for optimal attenuation across all frequencies and also snap-in ear cushions for easy maintenance.
More information: http://www.howardleight.com/ear-muffs/thunder