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 larger shell volume ensures not only better comfort during long hours of use, but also better attenuation of lower frequencies. The thin, comfortable headband can be worn under headgear and is also small and convenient when not in use.In accordance with PPE directive 89/686/EEC, and applicable sections of European Standard EN 352.