3M 7100203635 is a Protective Communication product by 3M. These earmuffs provide excellent hearing protection with an attenuation rating of 24 dB. They are designed to be attached to a hard hat, adding extra convenience. The wired connection allows for external audio input, making communication easy. They also feature a two-way communication direction and an auxiliary port (FLX2) for added flexibility. Additionally, these earmuffs are compatible with external 2-way radios for seamless communication. With a net weight of 243 g, they are lightweight and comfortable to wear.