Attenuation Rating - With professional sound-insulating foam and high-density sound-absorbing cotton, it has excellent noise reduction. With PVC cushioned headband, it has a good slow rebound effect and comfortable wearing, providing simple and convenient protection for a variety of working environments. The swivel earmuffs are automatically adjusted according to the head shape and face of the wearer, making them more comfortable and comfortable. Adjustable headband bracket, the length can be adjusted according to its own needs, so that its size and pressure can achieve a comfortable wearing effect. Highly comfortable cushion, filled with high-quality latex sponge inside, and leather-like edging on the outside, softly close to the ear to reduce the pressure