Thera-Band® Rocker and Wobble Boards offer an unstable and sensory-stimulating surface designed to facilitate balance and proprioceptive training and automatic postural reactions. The square Rocker Board and round Wobble Board provide the higher end of the Thera-Band System of Progressive Balance Training for rehab, post-rehab conditioning, and fitness applications. While the Rocker Board allows for one plane of instability at a time, the Wobble Board provides multiple planes of instability for the most challenging training. Both balance boards are made of black molded plastic with a specially-designed tactile surface on the top, and an anti-skid surface on the bottom.