Adaptable 2D Lumbar Support: Designed with an ergonomic 2D lumbar support, you can adjust the support strength from front to rear, and adjust the height to provide optimal support for your spine. The ergonomic lumbar support conforms to your spine's natural curve, ensuring comfort during long-term work. Supportive and Breathable Mesh Back: The minimalist mesh backrest provides responsive support, promoting air flow without getting bogged down with sweat. Comfortable Seat Cushion: The comfy desk chair features a 3.15 high-density sponge seat cushion and the unique mesh design is skin-friendly and breathable, making the computer desk chair a good choice for all-day comfortable office seating. Reliable Functionality: Holds up to 250 lbs. Static weight while featuring tilt lock, tilt tension, pneumatic seat height adjustment, flip-up arms, and a 5-star base with dual wheel casters.