The Dynaso Ball is similar to the Bosu Ball. It is a revolutionary device used for balance training, coordination improvement and stabilization. The Dynaso has a wide variety of features for both exercise and rehabilitation. You can use the Dynaso Ball with the dome side facing up, so it sits flat on the plastic base, or as a wobble board with the dome side facing down. Dynaso Balls are versatile enough to use as stretching aids, balance-training equipment, rehabilitation equipment and even strength-training and plyometric training tools.