For motorcycle riders, helmets are the most basic and important protection. In case of a traffic accident, it can ensure that the riders will not be seriously injured. However, in selecting and using helmets, several principles must be paid attention to, especially the expiration date. When the expiration date is exceeded, the protection ability will decline. There are many precautions for purchase and use of helmets, especially the storage period.

Principles for helmet selection:

1. Helmets also have a shelf life: Do not choose helmets that are 4-6 years after the manufacturing date, but must confirm the manufacturing date to avoid being cheated by the store or buying helmets that have exceeded the shelf life.

2. There must be conformity marks

Conformity seals include CNS, DOT, SNELL, ECE, R05, JIS and other marks.

Principles of helmet use:

1. Helmets should be replaced 2-3 years after use

Each brand may be different, you can ask the merchant.

2. Do not use helmets that have fallen heavily or had an accident

Even if it is only a small scratch, the appearance remains intact, but the helmet may have small cracks, and the protection strength may also decline, which is difficult to detect by the naked eye. It is recommended to replace it for safety. The shelf life and manufacturing date are the key to selecting helmets. If it is too long, the protective ability will decline. As for the reason for the replacement of the expired helmet, the main reason is that the interior materials of the helmet are all plastic PP, ABS and composite materials. After a long time of sun exposure, these materials will become brittle, which will lead to a decline in the protection ability. In case of an accident, the knight's head cannot be effectively protected.

When purchasing helmets, pay attention to whether there are conformity marks.

The global mainstream includes DOT, SNELL and ECE, of which SNELL is more stringent than DOT, but as long as there is one of the three, they are relatively safe.