The Original Zip Sac is the best way to practice all types of throwing. It is an ideal throwing aid for baseball players and softball players of all ages. 

Great to use for:

• pitching techniques

• throwing form

• warm-up

• 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.

*Ball not included