Signal noise ratio(SNR):32 dBNoise reduction rating (NRR): 25 dBMaterial:100% New TPEConforms to EN 352-2:2020 and ANSI 3.19-19743 Layers design allows fully attach to ear canal Reusable use for longtime in good shape Humidity and sweat resistanthelps preventing from moisture ramp up in the ear canalDesigned to be compatible with earmuff or other PPEPacked by plastic box