The 55 CM Anti-burst Stability Ball is an easy-to-use, highly effective accesory for core conditioning, balance training and spinal stabilization as well as weight training and physical therapy. They can be used in Yoga, Pilates, and fusion exercise programs to strengthen and firm abs, back and buttocks. Comfortable, convenient and durable for effective total body workouts. Features a durable, burst-resistant shell. Deflates slowly when punctured. Ideal for home use. Includes a pump. Type: Fitness Balls Gender: Unisex