1.COVER:High quality genuine leather or PU swivel chairs,comfortable and durable 2.FOAM: High density sponge,durable shape 1.COVER:High qualitygenuine leather or PU swivel chairs,comfortable and durable 2.FOAM: High density sponge,durable shape, soft seat 3.ARMREST:High qualitymetal and pu,fastness and comfort 4.BASE:High quality hard wood and steelframe ,strong 5.GASLIFT:High quality chrome,agile lift and no-malfunction 6.Tilt tension adjustable and lockable,seat height adjustable