This is an absolute joke of a product, and I’m ashamed of the NPA (not that I have a really good view of them anyway):
The idea that you need to spend $60 on a mouthguard to throw 2-3 MPH faster (BTW, they didn’t release this research to the public - we just have to take their word on it) is ludicrous. Yes, a mouthguard/mouthpiece can increase fastball velocity and improve the performance of other explosive movements through various physiological responses. But you can get a $2 one that works just as well as a $60 ripoff.
This is embarrassing. They should be ashamed of themselves, but money probably trumps all.