Sihoo M57 PRO Ergonomic Office Chair – The Evolution of Ergonomic Comfort The Sihoo M57 PRO is the latest upgrade to our best-selling ergonomic chair. Building on the success of the original model, this next-generation chair features enhanced design elements that ensure maximum support and adaptability for extended sitting periods. Key Features: •High-quality breathable nylon mesh upholstery: Promotes airflow for all-day comfort. •Double joint 3D adjustable headrest: Provides customized neck support. •3D functional and synchronous armrests: Fully adjustable with wide arm pads for enhanced comfort. •Adaptive and adjustable lumbar support: Offers personalized lower back relief. •Multi-functional mechanism with recline/tilt-lock feature: Ensures flexibility and ease of use. •Adaptive recline tension: Automatically adjusts to your body weight and movement. •Height-adjustable backrest: Customizable to suit different users. •Polished aluminum alloy base: Durable and stylish for long-lasting use. •TUV-3 chrome gas lift D100 (BIFMA certified): Ensures safe height adjustment and stability. •PU castors: Provide smooth and silent mobility. •Rated Weight Capacity: Supports up to 160 kg for re