silicone; Reaction ball--easy to use, simply bounce the reaction ball on any hard wall, floor or surface, balls; Reflex ball--unique six-sided design, will bounce in random directions so that your agility and reaction can be trained, reaction ball; Workout ball--, durable to use for long time, reaction ball; Bounce ball--it's a your reflexes and agility, reaction speed, hand-eye coordination, and can be used as a rehabilitation excercising tool, reaction ball; Agility ball-- training tool for professional athletes or players, reaction ball

What's in the box
1 x Other Strength Training Equipment