The PELTOR Optime III ear defenders are a high performance hearing protector and have been developed for use in extremely noisy environments. The protection is based on a technology with a double casing minimising resonance in the holder casing, maximising high-frequency attenuation. SNR = 35dB, High Frequency = 40dB, Medium Frequency = 32dB, Low Frequency = 22dB. Fits Scott Tuffmaster and Scott Style 300 helmets.