Asian fit helmets are really comfortable to wear! Usually Asian people have more rounded heads (wider and shorter). For European fit, I have to order an L otherwise it gets too tight on sides. It’s super bulky and there are lots of spaces in the front/rear so I have to fasten the BOA to the end. I was surprised that I can fit in an S properly when it comes into Asian fit. My friend who previously wears a L in euro fit was also able to size down to an M with Asian fit.Works great. Nice and light. The vent worked well during those early spring ski days.