The appearance looks simple and easy, Elastic backrest and cushion which is helpful for the healthy growth of children's vertebration, 9 kinds of height meet. With the standard of national education administration, It adapts to big-class, middle-class, small-class in kindergarten, It is made of imported PP material, and it is durable and colorfast. The quality cannot be influenced by the difference in temperature, normally it can be used for more than 8 years.