A modular helmet, also known as a flip-up helmet, is a type of motorcycle helmet that has a hinged chin bar that can be raised and lowered. This allows the rider to have the convenience of a full-face helmet when needed, but also the ability to flip up the chin bar for better ventilation or to make it easier to talk to someone.
Modular helmets are often more expensive than traditional full-face helmets, but they offer a number of advantages. They are more versatile, as they can be used in a variety of riding conditions. They are also more comfortable, as the rider can flip up the chin bar to get some fresh air or to make it easier to talk. Additionally, modular helmets are often quieter than traditional full-face helmets, as the chin bar helps to block out wind noise.