The Bilsom Clarity C2 Earmuff has an NRR of 23. It is a multi-position model designed for comfort, allowing the wearer to select position over the head, behind the head or under the chin. The Sound Management Technology™’s uniform attenuation allows the user to hear co-workers, instructions, and other important sounds naturally while blocking out harmful noise.  It's dielectric construction suitable for all workplaces, especially electrical environments. The Quick-Click height adjustment remains fixed during wear.  Snap-in ear cushions make replacement quick and easy. Sold in cases of 10 earmuffs.