1.High Comfort - Made with premium PU material and high-density sponge filling, the office chair feels soft and easy to care; wider&thicker seat and ergonomic backrest curve design bring you a comfortable sitting experience and relieve your back pressure efficiently. 2.Practical - Movable armrests can save more room for you when you don’t need it; adjustable gas lift satisfies people of different heights; 360 swivel castors make it more convenient to move. 3.Durable - All high-quality components have passed BMIFA test and have long service time; the maximum bearing weight of the excutive chair is up to 150kg. 4.Easy to Install - Instruction with clear diagrams and complete tools kit, all can be found in package which makes it easy for you to bulid the chair within 30 minutes even though you are not good at DIY. 5.Best after-sale - Any customer can apply to return and refund within 30 days because of quality problem(original package kept); free parts provided during guarantee time; you can contact our professional customer service about the products.