Features Good Noise Reduction --- The helmet ear muff earmuffs provide SNR 31dB and NRR 27db noise reduction level for hearing protection, which helps to complete a comprehensive above neck safety system. Helping to reduce exposure to hazardous levels of noise is a Comfortable Wearing --- The ergonomic ear muff is equipped with soft padding, which can reduce head pressure and bring excellent comfort. The spacious interior of the earmuffs ensures breathability, while the soft faux leather provides a tight sound insulat Easy to Install --- The seat design is easy to use with safety helmets with accessory slots. Insert the earmuff mounting adapter diagonally into the sockets on both sides of the helmet until it clicks into place. Perfect Fitting --- Compatible with most safety helmets but not suitable for full hard brim hats. The earmuffs are designed with retractable structure and can be adjusted to fit all sizes. The pivot point of the earmuff is tilted, suitable for everyone wear Wide Application --- For general industry, manufacturing, repair and maintenance, construction, oil and gas, forestry, shipbuilding, etc. Specification: Item Type: Helmet Ear Muff Material: ABS, Sponge Package List:2 x Helmet Ear Muff Package List 2 x Helmet Ear Muff