I dont know but i always were one riding, I was the only person to compete at high levels in the riding i have done who wore one, but i am paranoid, if you wear it at home why would you take it off at a show??
the champion cobra body protector is great, yes you do get a little warm in it when weather hot but nothing like other makes and it is more flexible with kind of flexi squares in the body of it. very comfy when on. The best I have worn and I wear one everytime I ride!