Peltor high quality ear defenders.
Optime I - RNR* 87dB(A) - 98dB(A) - Ideal for high frequency noise.
Optime II - RNR* 94dB(A) - 105dB(A) - Ideal for high and medium frequency noise.
Optime III - RNR* 95dB(A) - 110dB(A) - Ideal for all frequencies.
* RNR - Recomended Noise Rating