Represents the size of the helmet.

M, L, XL, and XXL are medium, large, extra large, and extra extra large respectively. Helmets are mostly semicircular and mainly composed of three parts: shell, lining, and suspension device. Head protection equipment, an indispensable tool for riding motorcycles and driving go-karts.

The shells are made of special steel, fiberglass, reinforced plastic, leather, nylon and other materials to resist head damage in accidents and play a protective role. In ancient China, they were called armor, head armor, and pocket armor. Or head.

Extended information:

Misunderstandings when using helmets:

1. The lighter the helmet, the better.

Relatively speaking, the lighter the helmet, the better. But the lighter the cycling helmet, the smaller the chance it will pass the national safety certification test standards, and the higher the relative price will be.

So the prerequisite for choosing a helmet is that it must pass the national safety certification test standards. Most helmets costing more than 200 yuan can weigh about 260G. This weight will not make you feel tired even for long distances, so don’t be too heavy. Pay attention to the weight index of the helmet.

Unless it's for a bike race. Try to keep the weight as low as possible, otherwise it is not worth spending the extra money to buy a super lightweight helmet.

2. The bigger or more holes the helmet has, the more ventilation it will have.

Breathability is key to a helmet, ensuring your head stays dry during long rides.

The more or larger the vents on the helmet, the greater the airflow around the head, and the cooler it feels. However, keep in mind that the more or larger vents on a helmet, the more of your head is exposed and therefore the degree of protection is reduced accordingly.

Road bike helmets have more or larger vents than mountain bike helmets. Likewise, road cyclists have to consider helmet weight more than mountain bikers. Generally speaking, the lighter the helmet, the more expensive it is.

Therefore, unless it is for bicycle racing and you want to reduce your weight as much as possible, it is not worth spending extra money to buy an ultra-lightweight bicycle helmet.

3. The helmet is broken or has been used for an extended period.

If it cracks, don't use it. Wearing it is just for comfort, not of much practical use. It doesn't matter if it's a small bump, but once the car crashes and the force is strong, it will disappear. It must be able to play a protective role.

4. Use inferior helmets.

There are strict technical standards for the manufacture of helmets. Inferior helmets often fail to meet safe anti-collision standards and can cause danger. Many riders may not know how to know whether the helmet they bought is safe. In fact, simply looking at whether the helmet has a CE certification mark cannot determine whether the helmet is safe. There must also be corresponding test reports and certification certificates.

CE mark certification is a certification for specific products, focusing on the safety features of the product. It is a compliance certification that reflects the product's safety, health, environment and personal safety requirements.

So in China, do cycling helmets not need certification? The answer is no. Before 2009, my country did not have a complete standard for the safety of cycling helmets. At that time, the "Safety of Sports Helmets, Bicycles, Skateboards, and Roller Skating Helmets" was jointly drafted by Transspeed Helmet Co., Ltd. and other companies. Requirements and Experimental Methods" was officially implemented in 2010. Since then, different versions of national standards have appeared.

But in China, most helmets are still produced according to the CE EN1078 standard. Because most Chinese helmet manufacturers still export a lot, the helmets bought in the Chinese market are basically CE EN1078 standards.

Some are affixed with this CE mark, but they are not actually sent to TUV. SGS has carried out certification. Each product and different sizes should have corresponding test reports and certification certificates. Consumers must Pay special attention. Helmets without safety certification are dangerous.

Therefore, helmets circulating in the Chinese market not only need to have the CE mark, but also have corresponding test reports and certification certificates to be considered a truly qualified helmet.

Baidu Encyclopedia_Helmet