Optimized for comfort, Walkers Razor Slim Passive Muffs have ultralow-profile earcups with a nonslip rubberized coating. Sound-dampening composite housing delivers a noise reduction rating of 22dB. Secure headband with metal wire frame ensures a custom fit and folds up for compact carry. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Non-Electronic Earmuffs.