This is John. John is a boxer. John needs a powerful mouth guard that can best protect his brain from knocking against his skull, causing a concussion, traumatic brain injury, or worse (we're talking d-e-a-t-h). Have you seen the research on what concussion, especially the multiple concussions sustained by a boxer or football player for example, can do to a person. Over time? It's disturbing, isn't it? If you don't know what we're talking about, google it. Anything with :edu (i.e. "concussion:edu") is going to heed you credible intel because you should never take someone selling something's word for it and the "edu" means education so it has to be legit. Right?

Needless to say, John is smart....