The Togu Ball Cushion Dynair XXL Train upright posture - Due to the large diameter, you now train with the extra large balancing cushion even in a hip-width stance. The therapy of joint stability, coordination and balance thus becomes axis-appropriate. The pleasantly soft material allows targeted training of the trunk muscles in the prone and supine position. The wobbly surface is also very challenging for children and is great fun. The cushion is equipped with gentle nubs on one side for additional stimulation of the foot reflex zones and velvety-smooth on the other. Please train standing exercises only with assistance. - Difficulty levels of the ball pillows - color blue Heavy - color black Very heavy.