Adjustable helmet with disabling insert

摘要

A removable flat flexible disabling insert is disposed between interengaging members which are provided for registry with one another in opposed displaceable surface portions of adjustable shell portions of an adjustable helmet. The disabling insert prevents interengagement of the interengaging members but permits adjustable displacement of the shell portions. The disabling insert, when removed, permits engagement of the interengaging members. Particularly, but not exclusively, the insert is used with a hockey helmet having front and back adjustable shell portions.