This helmet is a great design, for a couple of reasons. As others have noted, great venting that you can especially feel when rallying downhill. Also, I wanted a helmet that covers the back of my head better. A lot of helmets on the market don't offer a lot of coverage near the bottom of your skull, and this one fits the bill. The visor pops off easy, just be aware of that. Also, there is a ton of extra strap once I fit in the S/M size helmet. I just cut the extra strap off and seared the end with a lighter so it doesn't fray. My only concern is the retention system, which has kind of an asymmetrical fit to get it to fit my head right, meaning it has to be adjusted tighter on one side for it to fit right. I was right in between the two sizes, and went smaller and it fits snug but not too tight. Overall, I think the retention system will fit but I hope it is durable in the long run when I clobber my head on the ground someday. I would highly recommend this helmet to anyone looking for a highly breathable, rear coverage helmet.