My dentist was trying to sell me on a nightguard to keep me from grinding my teeth in my sleep and knowing my son plays baseball, he gave me a flyer for the underarmour guard. He said I didn't need this, but that lots of players were using these now (I think more for mouth protection), including his son who is going to a D1 this fall. He's a good dentist and an even better salesman, but I passed.