Compare with ordinary dumbells,the water inflatable dumbell advatages as following: 1.The weight can be adjustable 2.The surface of the products is popular,leads to the way to the international world 3.It has a high-quality plated surface for a long life use! 5.It has large use scope,is used to both Children and Adults 6.It has various kinds of specifications and styles,determined by yourself 7.Bottom price,super share,worth use!