This heavy-duty office chair features an industrial-grade safe and sturdy structure – reinforced BIFMA-certified metal base with premium SGS Class-3 gas lift; supports up to 350 lbs; pressure-resistant, explosion-proof; durable for long-hour office and home use. Ergonomic high-back body support – scientific high-back contour with adjustable lumbar support; fits natural spine curve; spacious seat with high-density resilient foam; comprehensive body wrapping; relieves sitting fatigue; maintains correct posture. Premium wear-resistant PU leather – high-quality soft PU; mild breathability; waterproof and scratch-resistant; resists daily stains and abrasions; easy wipe cleaning; sleek upscale look for home study and commercial office. Full-position customisable adjustability – flip-up padded armrests; seat height adjustment; 90–120° backrest tilt; 360° swivel; customise sitting angle and height for work, reading, and napping. Hassle-free assembly – complete tools and step-by-step instructions; quiet smooth-rolling universal casters for all floor types; professional responsive customer service and reliable warranty.