Q. Why do offroad helmets have visors?

The short and simple explanation is that the visor present on a dirt bike helmet helps in screening the rider from mud debris and tree branches. Additionally the visor helps protect the rider against the sun and rain. In point of fact motocross and ATV helmets do not have visors but instead feature a peak. With the visor on the head won't have to worry about getting muck and grime in the eyes if riding in muddy conditions. Especially if following someone who will undoubtedly be flicking up some muck behind them this is something to keep in mind.