The Original Zip Sac is a great way to practice all types of throwing when space is limited or you don't have someone to throw with. Simply attach the strap to your wrist and practice throwing the ball into the net pocket.
Use it for:
During off season
The Zip Sac is a great tool to get muscle memory and to use indoors during the off-season, or to get a few extra throws in while watching your favorite TV show. Ideal throwing aid for baseball players and softball players of all ages.
Ball not included.