This is one of the most comfortable helmets I've ever worn. The dial fit on the back of the helmet allows me to quickly switch from fit over my skullcap to bare head. The chin strap is much nicer than other helmets I've tried. The brim is low profile which I like as I've had problems banging other helmets against rocks as I've climbed.
The felt lining means that even with the good ventilation this helmet is pretty warm.