The Peltor Hi-Viz has a signal colour, giving wearers the added safety of high visibility. For workers who need to protect their hearing and be extra visible - on road construction sites or other high-risk workplaces.The Optime III Hi-Viz is a super attenuator, developed for use in extremely noisy environments and environments with a low-frequency noise range. This protection is based on double-shell technology, which minimizes resonance in the shell.In accordance with PPE directive 89/686/EEC, and applicable sections fo European Standard EN 352.