Adjustable Ergonomic Lumbar Support: The S-shape ergonomic chair design keeps the spine properly aligned and supported. The lumbar support is 2.8" adjustable to fit your body size, providing optimal support for the lower back, shoulders, and neck, while the adjustable headrest prevents the head from tipping forward, reducing pain. Thickened Seat Cushion: The ergonomic office chair seat is compressed with a high-density sponge and covered with a breathable mesh fabric. With a 3.5-inch (9 cm) thickness, it's 17% thicker than others, ensuring an incredibly comfortable sitting experience. Plus, The unique mesh design is skin-friendly and breathable, which keeps you cool all day. Multi-Functional Design: The 90-128 degree rocking design of this office chair perfectly caters to your diverse sitting needs—whether it's for work, relaxation, or taking a break. Its height-adjustable feature caters to the sitting needs of people of varying heights. You can find the perfect position to ensure a pain-free day for long hours of sitting. Easy Folding & Movement: Folding the armrests up 45°, you can push the desk chair directly under the desk to save valuable space. office desk chair comes with smooth PU casters, enabling you to effortlessly reach different areas without damaging your tile, wooden floors, carpets, and other flooring. Multi-functional Use: Whether you have a regular desk, standing desk, or adjustable height desk, mesh office chair can easily complement these workstations. It is a breeze to assemble with all hardware and tools included. Simply follow the chair instructions, and you can have it ready in just 30 minutes to enjoy. Package Content 1 x Office Chair 1 x Manual 1 x Glove 1 x Wrench