Article in English: Your motorcycle helmet is the single most important piece of equipment for motorcycling riding. It protects your head from injury in the event that your motorcycle goes down.  For it to do its job, the helmet must fit well, while maintaining your field of vision.  The best helmet for you is an individual thing.    To get the desired protection, get a helmet designed for motorcycle riders that meets established safety standards.  It does not need to be the most expensive helmet to do the job of protecting your head.  A motorcycle helmet that meets the DOT (U.S. Department of Transportation) or ECE (Economic Commission for Europe) standard is designed to do the job of protecting your head in an accident. These two standards are rigorously tested for the required safety standards to ride on public roads.  Additional safety features add to your protection and comfort.  Some riders prefer the Snell brand of helmets because they meet higher safety requirements (as set by the not-for-profit Snell Memorial Foundation), including performing at higher speeds and on harsher surfaces. To find the right size, get a professional fitting at a store that specializes in motorcycle equipment.  Alternatively, you can measure yourself by using a soft measuring tape to measure around your head about 0.5 inches (13 mm) above your eyebrows. Compare your head measurement to the measuring table of the brand that you wish to buy.  Note that each brand differs in their sizing, so consult the sizing table of each brand that you are considering. To find the right fit, try on the helmet. The correct fit puts the eye port just above your eyebrows with a very tight fit of your finger between your head and the helmet. Your helmet needs to have a snug fit to protect your head properly.  Different helmets fit different head shapes.  If your helmet is the right size but uncomfortable in the fit, consider a different one.  For the most comprehensive protection, look at full face or modular helmets. A motorcycle jacket protects your torso,...

Summary in Vietnamese:
Đội mũ bảo hiểm. Mặc áo khoác. Mang giày bốt mô tô, găng tay và những thiết bị khác.