Fit the four curvatures of the human spine.Adjustable height (up/down) and angles (front/rear).Highly breathable in mesh and highly durable in strength.This is an office chair that can be used separately from the back chair: 1 Material and quality of seats and back chairs: Choose high-quality, soft, and breathable mesh and frame materials to ensure that they are not easily worn out, comfortable, and durable during long-term use. 2. The chassis of the seat can be adjusted for height and tilt angle, which can be adjusted according to the user's height and different usage needs, effectively alleviating discomfort caused by prolonged sitting posture. 3. Height and width of the armrest: The height and width of the armrest should be appropriate, and the height can also be adjusted up and down to facilitate users to relax their arms, shoulders, and neck, reducing fatigue. 4. Stability and safety of the seat: A structurally stable and sturdy base and wheels can ensure stability and safety during use, and avoid problems such as tilting or sliding. There are styles to choose from, such as high back and mid back conference chairs. High back conference chairs are generally suitable for use by chairpersons or senior management personnel, providing better comfort and support. Mid back conference chairs are more suitable for general employees and ordinary use situations, with a simpler appearance and design, but equally comfortable. There are also many styles and colors to choose from for these conference chairs, and you can choose the most suitable style according to your needs and budget.Release your spinal pressure sitting for long hours.Up and down,forward and backward, left and right.