Space Saving Study Table 1、Sturdy and reliable chair supports a 155kg weight capacity 2、Ergonomic Student Chair is made with sponge-covered seat for comfortable daily use. 3、Durable mesh fabric: breathable comfort in summer 4、back can rock back and forth 5、Multi-functional Learning Seat Set 360 degree swivel base with smooth rolling casters for convenient multitasking 6、All Adjustable Height Study Chair have 12 months warranty(Contact us by e-mail directly if you need any assistance) 7、Family Learning Seats For Children 8 hours a day, one third of a person’s time is spent in a chair, So you need a comfortable chair, which can correct the sitting position, which is good for lumbar health.