The soft-shell construction and balanced, uniform weight of this ball make it easy to handle, It remains dimensionally stable and balanced while providing functional resistance during any fitness, sport, or rehabilitation exercise, Ideal for rotational movements, core exercises of many types and dynamic strength, Casing is sewn from 18 oz, flexible vinyl-coated polyester, Filler material provides even weight distribution and helps maintain shape, Size: 14""diameter, Ball slamming is not recommended! SKU: PWSS808