I bought the Giro G9 for a recent 5 day ski trip. I found it to be very comfortable- It was easy to forget you were wearing it. This is not easy to admit as I was quite reluctant to start wearing a helmet. The quick size adjustment mechanism in the rear was my favorite feature. It allowed you to quickly and easily customise the fit and made wearing a helmet liner on really cold days very easy.A couple of clicks on the adjuster made room in the helmet for the liner instantly. No more "too tight with the liner and too loose without it" compromises. this was the feature that put this helmet ahead of its competitors for me. 5 stars