Wrong use of helmets

Comparatively speaking, the lighter the helmet, the better.  But the lighter the helmet, the less chance it has of passing national safety standards, and the higher its relative price.  Therefore, the premise of choosing a helmet is to pass the test standards of national safety certification. Most helmets of more than 200 yuan can achieve about 260G. This weight will not make you tired even if it is long distance, so you do not need to care too much about the weight index of the helmet.  Unless you're doing it for a bike race.  Try to keep your weight down, otherwise it's not worth the extra money to buy a lightweight helmet. 

2. The larger or more holes in the helmet, the more ventilation 

Air permeability is key to the helmet, keeping your head dry during long rides.  The more or larger the air vents in your helmet, the more air flows around your head and the cooler you feel.  However, keep in mind that the more or larger the vents in your helmet, the more your head is exposed and therefore less protected.  Road bike helmets may have more or larger air vents than mountain bike helmets.  Similarly, road cyclists are more concerned with helmet weight than mountain bikers.  In general, the lighter the helmet, the more expensive it is.  So unless you're racing your bike and trying to keep your weight down, it's not worth the extra money to buy a lightweight bike helmet. 

3. The small buckle and the pull belt are related to life. The buckle and the pull belt cannot bear a certain force and will break. 

You probably only know that riding helmets have some impact tests, but buckles and straps are also subjected to tensile tests, and if they don't pass the tensile tests, they can't be used on helmets.  Therefore, a qualified riding helmet, small buckle and pull belt must pass the corresponding test, only a person in the true sense of the national safety certification test standard helmet. 

4. Cracked helmet or overdue use 

Cyclists should replace their helmets every three years, regardless of whether they have fallen or collided.  Although the helmet has not been hit, sun exposure and sweat erosion can also age the helmet and some accessories, reducing safety and damaging helmet protection.