Rudolph Electronic Ear Protection offers premium sound quality for the greatest experience while protecting your ears from damaging loud noise. Featherweight polymer plastic is used for a light weight fit and rugged durability. The soft padded ear cups are a must for comfort. This electronic ear protection automatically shuts out sounds over 85dB. With a 25dB NRR rating and 8x amplification, these sturdy, compact and collapsible muffs are light weight for all day use.