SIHOO A3 Ergonomic Executive Office Chair - the premium choice for optimal wellbeing and comfort in the workplace. Designed with ergonomics in mind, this chair boasts a sleek and sophisticated look that will elevate any office space. The breathable mesh backrest promotes proper airflow to keep you cool and comfortable during long work sessions. The adjustable headrest and lumbar support provide customized support to prevent discomfort and promote good posture. The chair's height can be adjusted to suit your needs, and the armrests can be raised or lowered to fit your body perfectly. Crafted with high-quality materials, the SIHOO A3 is a durable investment that will last for years to come. Whether you're working from home or in the office, this executive office chair will keep you comfortable and supported throughout the day. Choose the SIHOO A3 for a premium seating experience that prioritizes your wellbeing. Features High quality PA? full mesh upholstery for breathable comfort PP fiber headrest with lift and rotate adjustment for customizable support PA fiber backrest with 4 level up down adjustment to fit your body perfectly PA fiber S shape lumbar support to promote good posture 5D bionic joint armrest with super soft thickened handrail surface for comfortable arm support Gravity sensing mechanism with 4 position lock and up down adjustment for customized reclining Tilt back angle of 138 degrees for ultimate relaxation Sliding seating for adjustable depth 350mm polished aluminum base that passed 1136 kg static pressure test for durability Class-4 gaslift 100-4 that passed BIFMA test for safety PU castor ?