The reason for wearing riding helmets is very simple and important - to protect the head and reduce injuries. According to relevant data, 75% of the more than 500 bicycle fatalities each year are caused by fatal head injuries. Medical research has found that wearing helmets on bicycles can prevent 85% of head injuries, and greatly reduce the degree of injury and accident mortality. Half-helmeted riding helmets are divided into road dedicated helmets (without brims), road and mountain dual-use helmets (with removable brims), etc.