A bicycle helmet is disclosed having a flexible, articulated member depending from the rear of the helmet, providing a closer fit to an individual wearer's head and improving stability of the helmet on the head, particularly for mountain bike riding. The articulated member contacts the wearer's head...http://www.google.fr/patents/US5659900?utm_source=gb-gplus-shareBrevet US5659900 - Sizing and stabilizing apparatus for bicycle helmets
Sizing and stabilizing apparatus for bicycle helmets
