I use the helmut with the shield for snowmobiling. Good airflow across the shield. No fogging while riding. The upper part of the shield did ice up on the inside from face moisture in 20 degree weather. I often wear an ex-sm helmut. I ordered a sm. It was slightly tight but fit well after use. So sizing does run small.
Great for ATVs and snowmobiles as advertised. Excellent helmet - I followed the previous review and ordered one size larger than what their fit guide indicated. It fits perfectly one size larger.
The sizing chart had me fitting into a large helmet. When the helmet came I could not get it on my head. I reordered a larger size and I ended up fitting into a XXL. Could just be my head but I measured just as the sizing chart told me to. [...]Once I got the correct size I was very happy with the helmet. I have not used the snow shield on it yet.