New Markwort Swing Buster Pro-Model Hands Back Hitter Training Aid One Size:White/Black STRETCHWEB technology adapts to the

STRETCHWEB technology adapts to the runner's foot strike by unleashing the full potential of BOOST foam in the footbed and midsole

As a Certified B Corp

while a compression-molded EVA midsole provides gentle cushioning

NOCSAE Certified

New Markwort Swing Buster Pro-Model Hands Back Hitter Training Aid One Size:White/Black STRETCHWEB technology adapts to theSpring loaded power source allows use of balls of varying weights and sizes. Rigid steel construction. With instructional CD. The perfect tool that helps promote the proper swing. Uses all type bals, real and plastic, baseball and softball. Includes 12 medium weight plastic balls.