This adjustable water training bag is made of high-strength PVC material, providing a soft and comfortable feel. It features adjustable water volume, a convenient handle, and is portable for easy refilling. The aqua ball is ideal for weightlifting, stretching, and muscle training, and can be used in various locations such as home, outdoors, or the gym. With a maximum water capacity of 15kg, it's perfect for creating a dynamic water workout routine.