Heavy-Duty 400lbs Weight Capacity: This office chair is engineered with a robust metal frame and SGS-certified gas lift, supporting up to 400lbs. The stable base and reinforced structure ensure long-lasting durability, making it an ideal choice for big and tall users seeking reliable support. Premium Comfort for 10+ Hours：Upholstered in soft, breathable PU leather, the chair features a 4.3-inch thick high-resilience rebound sponge cushion and a quilted backrest. The ergonomic design provides full-body support, reducing pressure on your spine and hips during extended work sessions. Customizable Ergonomic Design: The adjustable headrest can be lifted to fit different heights, while the linked armrests move with the chair for consistent support. The backrest reclines from 90° to 155° and locks at any angle, and the retractable footrest lets you stretch out and relax during breaks. Dual Wrench Control System：The back wrench controls the recline and lift function, while the front wrench adjusts the seat height with a 3.9-inch range. This intuitive system allows you to lock the chair in your preferred position for personalized comfort and stability. Premium Parts & Modern Aesthetic:Built with premium components, including a stable tray and smooth-rolling casters, this chair ensures quiet, effortless movement. The sleek grey finish and quilted detailing add a touch of sophistication to any office, blending functionality with contemporary style.