Helmet Retention System
Fastening the Retention System
To securely fasten the D ring retention system, thread the end of the chinstrap through the D rings only as shown in diagram B and pull it tight against your throat. Clip the chin strap end hook on to the D ring as shown in diagram B to secure the loose end of the chin strap after securely fastening the chin strap. The only function of the chin strap end hook fitted on the end of the chin strap is to avoid fluttering of the end part of the chin strap.