After we put on our helmet, we also lock it with the ends on the chin so that it does not come off our head in the event of an accident.
Micrometric: It is very easy to connect. It is enough to connect the two ends. (Video)
Double-D Ring: It takes more time to bind but is more secure. (Video)
In a load test, micrometric: broke at 9.81 nm, while Double-D Ring: broke at 15.91 nm. Not only that, it has been proven in many tests to be safer.
Suggestion: The filtering system on the helmet reviews page can help you find the helmet you want.