Superior Lumbar Support Equipped with built-in lumbar support that provides excellent lower back alignment and reduces discomfort during extended sitting. This feature helps to promote good posture and alleviate pressure on your spine, ideal for people with long work hours or back pain issues. Premium PU Leather Seat & Breathable Mesh Back The soft PU leather seat offers long-lasting comfort and easy maintenance, while the breathable mesh back ensures proper air circulation to keep you cool and comfortable throughout the day, preventing heat buildup. Adjustable Height & Armrests Tailor your seating position with a height-adjustable gas lift, allowing you to find your ideal seating height. The adjustable armrests ensure proper arm support, promoting comfort and reducing strain on your shoulders and arms. Sturdy 300lbs Weight Capacity Built to last, this chair is engineered to support up to 300lbs. The heavy-duty construction makes it a reliable option for users of all sizes, providing robust stability without compromising on comfort. Smooth Recline Function Relax during breaks with the smooth reclining function. Adjust the backrest to your preferred angle for maximum comfort and stress relief. 360° Swivel & Smooth Rolling Casters Enjoy full range of motion with a 360° swivel, and glide effortlessly across the floor with smooth, durable casters designed to protect your floors while providing easy mobility. 【300LBS Weight Capacity Office Chair 】This heavy-duty office chair, made of high-quality materials, features a sturdy metal base and smooth-rolling nylon casters that can support up to 300lbs. It is certified by SGS and BIFMA. The 3-level cylinder allows you to raise or lower the chair smoothly and safely. The casters move freely, can swivel 360°, and glide smoothly across different floors without causing damage 【Comfortable Seat Cushion】The seat of this chair is crafted with high-resilience foam, measuring 18.9 inches in width and 18.11 inches in depth, providing lasting comfort and support. Its breathable, elastic mesh backrest enhances airflow to keep you cool and comfortable even during extended periods of sitting. 【Ergonomic Design】Designed for all-day comfort, this ergonomic chair features an S-shaped backrest with 1.18-inch adjustable lumbar support that aligns with your spine's natural curve. Customize the fit to reduce strain, ease lower back fatigue, and protect your spine — perfect for long hours of work, study, or gaming. 【Flip-up Padded Armrests & Breathable Mesh Backrest】Designed for flexible comfort, this office chair features flip-up armrests padded with soft PU leather and high-density foam, offering reliable support while allowing you to tuck the chair neatly under the desk or sit cross-legged with ease. Paired with a durable, breathable elastic mesh backrest, it ensures firm support and lasting comfort throughout your day. 【Excellent Customer Service & Easy to Assemble】We provide excellent customer service and a hassle-free assembly experience. Should you encounter any issues such as missing parts, product damage, or other concerns, please contact us through Amazon's messaging system. We will respond within 24 hours and work to resolve your issue promptly. Assembly is straightforward—all necessary tools and clear, illustrated instructions are included, allowing you to assemble the chair easily in just 20–25 minutes.