This office chair has an adjustable backrest. It can be raised and lowered，360 degree rotatable, and smooth casters. Provide you with a sense of comfort. It is suitable for various applications and is an ideal choice for personalized comfort. ADJUSTABLE COMFORT: The Alivio Office Executive Chair offers adjustable features to ensure your comfort. The backrest is adjustable, allowing you to raise and lower it. The chair is also 360° degree rotatable, and it comes with smooth casters for easy movement. It's designed to provide you with a comfortable and versatile seating experience. SUPPORTIVE DESIGN: With a certified pressure bar supporting up to 150 Kg/330 lbs, coupled with a perfect sponge cushion, this chair is built for durability and comfort. The retractable footrest allows you to stretch out your legs comfortably, enhancing relaxation during work breaks. ERGONOMIC BACKREST: The multi-layer ergonomic backrest is designed to fit the human spine, providing support to the lumbar region. The thickened headrest and seat cushion, equipped with high-density sponge, ensure that long hours at the desk won't lead to pain or discomfort. PREMIUM MATERIALS: This high-back executive chair features high-quality cowhide, latex, and solid wood construction, giving it a smooth, beautiful, and easy-to-clean appearance. The chair's wheels are almost noiseless and won't damage the floor. The cowhide seat contact surface is comfortable, breathable, and durable. FLEXIBLE FEATURES: The chair's dimensions are 46.0 × 25.5 x 20.4 Inch. It offers seat height adjustment from 48-54cm, a 90°-135° lean-back feature, and a 360-degree rotation capability. The high elastic sponge backrest, seat cushion, and fixed armrest together offer a comfortable experience for your entire body. STURDY CONSTRUCTION: SGS Certified Air pressure rod, and aluminum alloy feet, ensuring durability and stability during prolonged use.