Materials: MeshColor: GreySwivel: YesHeight Adjustable: YesOverall size: 23.2" L x 20" W x (47.6" -51.6")HSeat Size: 19.7" L x 20" WBack Size: 20.8" W x 30.3" HWeight Capacity: 350 lbsErgonomic Mesh Design: The S-shaped backrest fits the natural curve of the body, and protects your lumbar spine and back. The premium mesh material backrest keeps the body cool and cozy by enabling continuous airflow. High resilience padded cushion with a larger bearing area for reducing the body's pain. The waterfall cushion edge promotes better leg blood circulation.30 Degrees Locking: Our mesh office/computer chair is easily adjusted for height(17.3''-21.3''), the 30° locking mechanism keeps the back upright and relieves the stress and pain brought on by other office chairs.360°swivel provides freedom of movement in any direction.Strong Five-Star Base:The updated nylon five-star chair base is stronger than steel and has a higher capacity of 300 lbs. The matte lacquer surface makes the entire office chair more coordinated and beautiful.Heart -Shaped Back: The Office Chair with a Heart Shape mesh back, and the waist position on the back has a button to adjust the waist position (one board can move up and down)Easy Assembly: All required hardware and an Allen wrench are included in the box - no additional tools are needed. Also coming with clear pictorial instructions and tools, the ergonomic chair is easy to assemble (about 10-15 minutes).