I'm pretty picky about helmets. I live in the southern hemisphere where we do a lot of HC climbs in very hot weather. I ordered this helmet through BTD and had my son bring it down. Wore it out into the Andes yesterday and here is what I LOVE...
-Ventilation is incredible.
-Fit is so perfect you don't notice it. It's very light too.
-Sunglasses actually fit against my head not helmet parts.
-The non-padding throughout the helmet is a non-issue. Especially in how that really helps to keep the head cool. Trust me, you will not notice it.
-The glasses docking when not wearing them is OUTSTANDING.
-I wear a 718 to 714 when buying fitted ball caps and the Medium is dead on perfect.
-One last thing...it looks GREAT on the head too.
These glasses are so light weight and comfortable you forget you're wearing them. The grippy nose piece helps them stay in place. The arms of the glasses have a nice curve which allows them to wrap around your head. The rimless lens is fantastic, nothing to obstruct your field of view. I believe the best feature of these glasses in the Road Prizim lens. These lenses allow you to see so much more detail on the road surface, especially as you move from bright sun to shade.
These glasses are so light weight I was initlally worried that they would not stay in place while riding. This hasn't been the case. Five cyclocross races this year and about a 1000 miles of riding and I haven't had to adjust the glasses once. These glasses are now one of my favorite cycling accessories.