Description The JSP Sonis 3 Helmet Mounted Ear Defender is rated to 36dB and ideal for harsh and noisy environments. The clip-on ear defenders are designed to be attached to hard hats, helmets, powered respirators, brow guards and other head protection. JSP Sonis 3 Helmet Mounted Ear Defenders Features & Benefits SNR 36 rated High attenuation large cup 112-117dB Suitable for heavy industrial noise Colour Coding for easy selection Customisation available with company logo / branding