Callaway’s practice balls are made from a dense foam, so they also fly quite similarly to a real golf ball. They come in green, orange and pink and include a mesh carry bag to keep you organized ...

Small foam balls – tennis ball-sized green ones and yellow ones the size of ping-pong balls – are used instead. The only carryover from a normal batting practice session is Souza’s bat.

Stimp is the measure of how fast a green is—the higher the number, the faster the ball will roll. BirdieBall offers stimp options ranging from a slow 7.5 up to a lightning-quick 13.