Having changed the size of the helmet perfectly maintains loosely nor too little, after several hours (sweat &) the vents work well and allow to not get too hot.
In addition, the headset features a comfortable viewing angle (I had tried other more troublesome on that side).
I do not put the maximum score for two reasons:
- The sizes do not seem to agree, in fact I had my head circumference measured as indicated but the headset was still too small.
- The screw to move the visor does not seem very strong, to do with time.
Finally I recommend this purchase, personally I find very successful helmet.
