Easy To Assemble - We provide all the tools and the detailed instructions for you. No additional tools needed for assembly. For your convenience, all screws have extra backups. It is easy to assemble this office chair by yourself at home. Ergonomic Design - Designed with human-oriented ergonomic construction.streamlined armrests fit the curve of your arms,allowing you to sit comfortably on a work chair. The locking mechanism is easy to adjust the height, keep the back upright, can take care of your lumbar spine, help prevent back strain and muscle fatigue. Breathable Padding Seat - the padded mesh Seat is thick and resilient. Made of high Quality thick sponge and breathable mesh clothes, prevent body heat and keep your hip and legs sweat-free. Lumbar Support - Our mid back chair we use resilient, strong mesh which moulds to your lower back, alongside the waist pillow offering superior support, protecting your lower back and promoting better spinal alignment. Quality Assurance - All the