About this item 【High-quality material】 - The seat is made of high-quality breathable fabric in black, wear-resistant and stain -resistant . - Inner #40 more High density and elastic sponge, prevent oxidation and crushing, moderate hardness,good resilience and not easy to deform.- Seat and back, armrest are made of injection molding with PP firber , high tensile resistance , big size with ergonomic design , comfortable enough. - R320mm size nylon base, high quality and durable using. - 50mm size PU wheels, easy to slid and work smooth without noise. 【Multi Function】 - Height adjustable function: Matching BIFMA Class 3 gas lift, durable, reliable , adjustable to your comfortable position . - Swivel function: 360 degree swivel and multi direction wheels. - Tilt - locking function: the back with Tilt 15-40 degree, and locked for work or Nap. - Headrest support , Ergonomic design, Fit the curve of neck , can be nap and release pressure . 【Dimension】 W23.23” x D7.48”x H46.06-49.41” inch. 【Wide Usage】 This chair is suitable for office , home , watch show, do the work and have a rest. It will make your space more modern and elegant.