Features: Made from superior quality material, resistance to low temperature, corrosion and impact New technologies in comfort, design and protection all come together in this groundbreaking earmuff This ear muff fits a wide range of industrial safety hard hats, attaches directly to many hard hats without an adapter Ideal for protection against noise arising from a wide range of applications in the workplace and leisure activity It is a good helper in your home, study room, travel (car, boat, plane), construction site, noisy urban area, etc. Specification: Condition: 100% Brand New Material: ABS Color: As picture shown NRR: 31dB SNR: 36dB Package List: 1 * Pair of Ear Muffs 1 * User Manual