[Breathable Mesh chairs] Our tables and chairs feature high-quality reinforced mesh that provides excellent airflow to avoid sweating and adhesion and keep the air flowing. [Ergonomic design] This ergonomic office chair has adjustable lumbar support, and its S-curve backrest is designed according to the curve of the human spine to relieve back pressure caused by long-term sitting. [Multi-function Swivel Chair] You can easily raise and roll the seat by adjusting the lever under the chair. The five-jaw base and 360° rotating nylon casters are rugged and easy to slide on any floor surface in your home or office. 【 Adjustable headrest and armrest 】 You can adjust the height of the headrest and armrest according to your needs. The large curved headrest provides excellent comfort and support for the head and neck.