helmet extra quick release system

standard meaning helmet extra quick release system products such as ISO, DOT, Snell, an international quality certification for an item that will be marketed:

Product quality certification is issued by the Department of Transportation in America, all goods which have been certified as DOT, means have been unsuitable for use and the quality is regionally and internationally. Because America itself is very tight at all for transportation safety.

Certification issued by an international independent body which handles issues specific helmet, good for a bike helmet, helmet project, motorcycle helmets and helmets car. Usually wearing a helmet that has certified more recognized by the international Snell, because the independenannya. This is due to the quality standards of each country differ.