The meeting rules ansi class c ansi full-top hat edge for a type 1 helmet. In addition each helmet comes with a rim handle on the left side and right where a person would normally grab the helmet. This helps both keep the helmet surface clean, but also to add better grip for the helmet. Each carbon fiber hat comes with a 6-point ratchet key suspension and must fit head sizes 7.0 to 8.0.
The suspension comes with a quilted top to offer extra padding for the head. Finally, the full-edge design is wider on the sides and back to provide protection from the elements on the outside. It's really an awesome helmet.