V-Gard® Protective Caps and Hats Consist of a polyethylene shell and suspension system working together as a protection system. Cap or hat styles, with the cap available in three sizes: small (6 - 7 1/8), standard (6-1/2 - 8) and large (7-1/2 - 8-1/2) and the hat in 6-1/2 - 8. Principle(s) of Operation Not applicable Approvals and Standards V-Gard Caps and Hats meet or exceed the applicable requirements for a Type I helmet (top impact) as outlined in ANSI Z89.1 1997, Class C, E and G (formerly Class B and A).