Si Paton is right. Tear offs and roll offs work really well! The thing I struggle with is the upkeep. It's hard to stop water, girt getting back there sometimes. I prefer to only use them with fresh goggles on a race run, then regular goggles and a Neoguard for practice and non race day riding. http://rapidracerproducts.com/NeoGuard%20pages/Reviews.htm