Honeywell Howard Leight L3 Earmuff providing hearing and ear protection in work/industrial/DIY environments. Solid, lightweight construction using high quality ABS plastic, comfortable high density/low weight foam. Bilsom's patented baseplate technology controls how the sound reaches your ear; this means that the earmuffs are designed to provide a more consistent attenuation for all noise applications. These L3 Earmuff's have an SNR of 34 decibel. EC certified EC1294 and Quality Assurance ISO9001/2000.