Giro G9 Helmet, this years model is defectively engineered. The brow is so big that goggles will not fit. The helmet pushes the goggles down your nose and cuts off your ability to breath through your nose. Extra pain in the butt when it is really cold and you are wearing a face mask or such and want to breath though your nose but can't.
Tried my Smith Phenom, and older goggles both Scott and Briko none of the 3 pairs fit and all were pushed down my nose.
Maybe Giro goggles work but watch out or you may make a $ mistake not to mention the inconvenience.