Bilsom offers a sophisticated filtering system with their patented technology without using electronics! Want to keep harmful noise out, but still hear your coworkers, warning alarms or sounds? These Clarity C Series earmuffs feature height adjustment for comfort and a ventilated and padded headband. Also feature a super soft ear cushion. Bilsom Clarity earmuffs meet ANSI S3.19-1974/CSA Z94.2 safety standards.Do you order this product often and/or in large quantities? Check out our Large Order Program to save yourself time and money.