Stay Ball Weighted Stability Ball by Maha Fitness Type: Running Packs Features: Keep steady with the Stay Ball Weighted Stability Ball by Maha Fitness. This weight stabilized ball is filled with 2lbss of sand. The added stability helps you better keep your balance and focus more on your workout. Whether you're stretching, doing yoga, or working out, the Stay Ball is the perfect tool for you. This weighted stability ball even includes an easy to use air pump. Size: Small Material: Plastic Color: Purple Color Mapping: Purple Gender: Unisex Age: Adult