The arm guard fit really well, my son has taken some hard pitches to the arm without any injures or issues.

Fits great .

Doesnt matter the speed of the ball you still cant feel it. Because they are not easy to quickly take off, you will wear it from at bat until you score. The underside will start ripping halfway through the season if you are a headfirst slider so order a couple if you like them. Best protection out there but it would be nice for returning customers to be offered a discount on them