The Peltor Optime III H10A is a super-muff and has been developed for use in extremely noisy environments. The protection is based on new technology with a double casing that minimises resonance in the holder casing. This results in maximum high frequency muffling while at the same time it’s still easy to understand speech and signals. An acoustic connection between the inner volume and the volume between the casings in the Peltor Optime III H10A provides maximum low frequency muffling. The sealing rings are broad and filled with soft plastic foam for the best fit and low contact pressure. Effective protection and best comfort are the hallmarks of the Optime III.