Out of all gear, the least I know about is neck braces. I don't know anyone who uses them either, and I can't seem to find any near stores. Do they all work the same? no need to spend $200 on one when there is another for $100? I tried doing some research and I couldn't find anything that says the more expensive ones are more safer. None don't really give much description or specs about them when looking online besides it claiming it prevents your head from going to far back.