This was my first helmet I purchased and it came in fast and fit perfectly. It has been about 4 months or so I believe and it looks brand new except the dark smoke screen I put on it. The air flows pretty well as I live in Texas and it gets real HOT. Now that its winter I close the vents and just experience the wind coming through my neck area. I haven't had a chin curtain on a helmet before, but I doubt it would make a large difference and for a close out deal it was a steal. I was worried that it may fit too big, but it ended up being snug and I broke it in throughout the months since I purchased. It got more comfortable and it still passes all the test of staying glued to my head and face. As for the air rushing to my face my jacket has a neck cover which prevents that so I don't find that part an issue, some may though. Keep the rubber side down!