Adjustable, very comfortable earmuffs for strong noise. Large cushions are made of blue, foam ABS. They have adjustable tape over the head with a protective helmet. It can be worn over the head and then they provide attenuation up to 27 dB SNR, or behind the head, when it provides attenuation up to 26 dB SNR. They are used in industry, compressor stations, machine plants, construction sites, on runways, in automotive industry, agriculture, etc.