Hbada Ergonomic Executive Office Chair, High-Back PU Leather Swivel Desk Chair, Extra Padded Armrest Large Seat, Adjustable Height Computer Chair, Black 【COMFORT SUPPORT】Double layer ergonomic backrest consists of soft elastic cotton and native sponge can fit human spine and support lumbar. Thickened headrest and cushion filled with high-denisty native sponge to ensure you will not feel pain or sore for long time working at your desk. 【HIGH-QUALITY MATERIAL】This high-back executive chair upholstered in high-quality PU leather. It's a durable synthetic leather resist oil and water can makes the office chair smooth, premium looking and easy to clean. The wheels make almost no noise and won't damage the floor. 【ADJUSTABLE DESIGN】The pneumatic seat height adjustment will meets your different needs. The whole office chair can be rock to 125 degree. 360 degree rotation cushion and rolling swivel caster make this desk chair more flexible and convenient. 【ASSEMBLY&SECURITY】Certified by BIFMA ,the sturdy five-star base is made of metal and weight support up to 330 pounds .Also,It's easy to assembly, and the detailed instruction and tools are included in package. 【AFTER-SALES SERVICE】All chairs purchased in our shop are covered by a 1-year warranty. If you encounter any problems during installation or use, please contact us and we will solve the problem for you.