The Sonis range of ear defenders has been designed by the JSP RandD team Working with a leading UK acoustic engineering research facility JSP have developed an ear defender range that peaks at an unbeaten 37dB SNR. This exceptional range of Ear Defenders is Kitemarked and meets EN352-1 and EN352-3 The Sonis offers a wide spread of attenuation, with SNR values between 26dB and 36dB, giving the end user a wide range of choice depending on their requirements and simplifying selection. Choose either the ventilated over moulded or the reflective extra visibility head band Both deliver a balanced amount of pressure to seal the cup without causing the wearer discomfort. The wearer can tilt and adjust the position of the ear cup to refine the fit and increase comfort and performance Manufactured from steel enabling the arms to maintain performance over a wide temperature range.