First, warn others. On the road or in the open air, the light was too Dim cannot make people feel you have hidden dangers, reflective, for example you lost rescue personnel can quickly find you, on the highway through the light reflection will make drivers aware of your presence, to avoid accident. Secondly, increase the safety factor. For example, walking and running, some people like Highway, reflective clothing will greatly improve safety, this reflective look very bright to the naked eye, if the drive where you can clearly see it around you, like the highway pointing to the signal at night under the light reaction, clearly plays a role. Third, to avoid security risks. Some construction workers mistakenly believe that wearing reflective helmet unnecessary, therefore do not always wear a helmet, some cool and shade to wear straw hats, some feel uncomfortable wearing does not buckle.