Basically what Rant machine said. I have bought 2 lids so far. I bought a £25 a few years ago just to use on the back of my mates bike, fairly naff tbh cold, let air in everywhere, felt a little flimsy. I bought a caberg V2RR when i started riding for £130 it's lovely, Warm, Great safety rating, Looks awesome. It's quite big but at the end of the day i dont mind if it will save me =D Go try some on and be prepared to spend a little bit of money. Go to a shop KNOWING what you want and how much you want to spend and if you don't find it move on. Also don't buy online. Or second hand.