Medium 2 way stretch knit fabric

Also found throughout the entire line is the Minimus UD Carbon fiber

• Thumb Etip™ compatible

allowing for more efficient energy transfer meaning improved speed and agility

SKLZ Impact Baseballs (12 Pack) shorts Medium 2 way stretch knitConstructed with proprietary pop back material similar to the material used to make car bumpers, Impact Baseballs keep their shape and won't crack like standard practice balls even after thousands of swings. Built to provide instant feedback on contact, they help hitters tune their swings to find that all important sweet spot. 9 inch Regulation Training Baseballs.