Compacumet is a safe national certified disaster prevention helmet that can be stored compactly in 3 compartments, so you can store a bulky helmet with a thickness of about 3.3 inches (8.5 cm) and you can easily set it up quickly and securely fasten it with a fastener. The chin strap has a whistle so it can be used as a shoulder bag that can be used for rescue, call and check work in times of disaster, so it is convenient to carry around and use at construction sites. National certification (protection against flying and falling objects/crash).