The lower limit of the working temperature of ABS safety helmets can generally reach -50 ℃, and they can be used normally in common low-temperature environments, such as outdoor work environments in winter in most parts of China. In low-temperature environments, ABS material can still maintain a certain degree of toughness and strength, basically maintaining its protective performance. However, it should be noted that when entering a warm environment from a low-temperature environment, condensation water may form on the surface of the safety helmet. At this time, it should be wiped dry in a timely manner to prevent the normal use and protective effect of the safety helmet from being affected by the freezing of water. If the working environment temperature is consistently below -50 ℃, it is necessary to use a safety helmet that is more suitable for extremely cold environments.