Ski Helmet Face Mask Hook

Getting a good face mask on and off at the lift line is tedious with ski helmets on. These hooks slide on to your helmets chin strap and let you affix a standard face mask.
I generally need to put one knot in the face mask straps to get the sizing right.

Tested this on a Giro Combyn helmet. It might not be sized right for helmets with very thick straps. For thick straps use the *_Thick.STL model.