Strengthen and tone your upper and lower body with this 65 cm diameter workout ball. Half of the surface of the myofascial ball features a spiky textured surface to provide a satisfying a deep tissue massage to sore muscles, and the other half features a smooth surface ideal for a wide range of ab and core training exercises, and the exercise ball can also be used for yoga, Pilates, pregnancy, school classrooms, or even as a replacement for a chair when sitting at your desk. This physical therapy ball is composed of strong PVC material to ensure that the yoga ball can hold up to rigorous workouts without deflating, and includes a hand pump so that you can easily inflate within minutes.