Height Adjustment & Rocking Function The office chairs seat height is adjustable to match your height and posture. Just lift the lever under the seat, you can adjust the seat height from 19 to 23. Meanwhile, a knob is designed to control the rocking tension, you can lean against the backrest that rocks between 90°-105° for a relaxing experience. Unique Leathaire CoverThe computer desk chair features unique leathaire cover that combines the advantages of leather and fabric, providing a modern look and excellent breathability. Besides, the sleek surface is waterproof and easy to clean, allowing simple maintenance for your convenience. Ergonomic Upholstered SeatThe executive chair is designed with comfortable backrest and armrests to greatly relax your back and arms in long-time work. The wide seat cushion is integrated with for an ergonomic support to your body. Moreover, the wide seat is padded with high-density sponge (3.5 thick), which is resilient and non-deformable.