Well I can not ride with it until end of Fem. I just put the Photogrey insert in the helmet. Goes on very nice with sticky all the way around the insert. It changes very fast and gets nice and dark and again back to cklear. They make 6 versions. Mirror red blue clear etc. Only down side that I can see at this point is it can scratch easy, or appears that it can. $19.00 not bad.