Corded Earplugs seal the ear canal with soft foam for remarkable noise reduction and comfort and its regular size fits most ear canals. Earplugs insert easily and can be expanded inside the ear canal for maximum comfort. It stimulates full compliance and the bright neon yellow look makes compliance checks easy. Plugs are made of polyurethane foam which offers great attenuation along with low pressure comfort and provides the highest noise reduction rating at 33 dB. The poly bag keeps the plugs clean before use, 1 pair per poly bag. Meets ANSI S3.19-1974 Standards.