DescriptionTake control and meet your fitness goals without expensive exercise equipment. Using a stability ball will improve the strength of your abs and lower back. Since your yoga ball is unstable, you have to use your body's core strength to remain balanced, which in turn improves proprioception, flexibility and body alignment.Features- Color: Random color. - Material: PVC. - Diameter: 25cm. - Take the yoga ball outdoors, exercise in the fresh air, and let nature be your coach. - Train, stretch, and take care of your body without even leaving the house. - Experience a new way to stimulate your muscles by simply sitting in the office. - Exercise balls are perfect to increase balance, strength and flexibility. - With this versatile piece of fitness equipment you can get trim and toned by exercising abs, back, glutes, hips, arms and more making it the full-body tool.