I wear a helmet and have had my fare share of decent impacts with it, including one that lead to a slight concussion. My question is, after all of these impacts (non being super serious) over the years, should I replace my helmet? I know with bicycle helmets they say to use em once. Is it the same thing with a ski, snowboard helmet? I lost the care instructions, if there were even any, from my helmet so maybe someone has one with the official word on it?I kind of want a new helmet just for looks, but if there is a safety concern as well, I have another good reason to buy it…..Thanks in advance.