The MX0100CS from Radians Inc., also known as the Maximus Earmuff, is a passive sound-dampening device featuring full-sized, comfortable hearing cups and a premium padded headband for optimal comfort. This earmuff provides a National Institute for Occupational Safety and Health (NIOSH) Noise Reduction Rating (NRR) of 28, safeguarding your ears from loud noises effectively.For an enhanced experience, pair the Maximus Earmuff with the included Deflector Foam Earplugs from Radians. These earplugs bear an exceptional NRR of 33. The combination of these two high-grade products enables a combined attenuation of up to 38 dB, ensuring superior hearing protection.