I'm a recreational biker and was looking at this and a sport one. People were warning me the Bern helmets would get really hot in the summer compared to the sport ones but I was pleasantly surprised the vents were great and I can feel the air flow though and didn't get hot. Great look as well. Love the versatility of this, as I can wear this on the slopes come ski season. I have a tiny head and normally wear an XS in everything and was right between an XS and S in this helmet. I ended up getting size S and it's the right size - it's adjustable for the perfect fit.