Emoly Exercise Ball for Yoga, Fitness, Balance Stability, Extra Thick Professional Grade Balance & Stability Ball – Anti… $14.66 – $16.99 Make sure this fits by entering your model number. All-in-one home gym equipment for variety of functions: use our exercise balls for a wide array of active exercises such as yoga, Pilates, or CrossFit to tone muscles, increase Cardio endurance, build strength, and control weight. Gym grade exercise ball: Professional quality PVC material, that stretches evenly across the ball surface, maintaining its shape longer and preventing it from rolling away.