These earmuffs have been developed for use in extremely high noise environments, particularly those dominated by low frequency sounds. The protection is based on a technology with a double casing, minimising resonance in the holder casing resulting in maximum high frequency attenuation.
Broad sealing rings filled with soft plastic foam for optimum fit and low contact pressure
Good speech intelligibility
Easy to replace cushions and inserts help keep them hygienically clean
Helmet-mounted version is designed to fit a wide range of industrial safety helmets
Reduces noise levels up to 35 dB
SNR: 35 dB (headband/neckband); 34 dB (helmet-mounted)
For more details, please follow https://uk.vwr.com/store/product/10387250/earmuffs-peltortm-optimetm-iii