PU & Silicon with noise reduction up to 34dB,ergonomic design and flange multi stem comforms ear Our earplugs are made of PU & Silicon with noise reduction up to 34dB, providing a comfortable all-day fitEarplugs with retention device, ergonomic design and multi-flanged stem comforms to ear shape and ear piece retention.Attenuation filter in 23db for music events, disco, concerts, clubbing, etc, ...