SIHOO - C300 Pro Ergonomic Office Chair with Soft 6D Armrests, Dynamic Lumbar Support, Adjustable Backrest - Black

The SIHOO A3 office chair, an innovative ergonomic model, uses advanced technology to ensure comfortable sitting and proper posture. It features automatically adjustable 4D headrest, lumbar support, linked 3D armrests, an intelligent gravity mechanism, and automatic adjustment, along with a soft backrest and breathable mesh seat for all-day comfort. Its 3D headrest offers wide-angle adjustment (4.5cm up/down, 6.5cm forward/backward, 20° angle) and is made of soft mesh with a triangular soft elastic frame and support straps for back support; the 4-position adjustable 6cm liftable backrest suits all heights and auto-reverts to level 1 when at maximum height. It also comes with domino auto-adaptive lumbar support. The intelligent gravity mechanism with weight-adjustable resilience enables 2-step auto-adjustment and tilting from 92° to 100° to 112° (max), allowing comfortable rocking or short breaks. Certified by American BIFMA and German TUV, it has passed tests like backrest strength and seat impact tests, and is equipped with SGS Class 4 cylinders for durability and safety. It comes with a 3-year warranty, with support available for any product issues.

Stop fighting your chair. The C300 Pro V2 ergonomic office chair moves with you—lean forward to type, lean back to think, and the backrest follows your spine in real time. Whether you're crushing deadlines or deep in a game, this gaming chair keeps you supported without the stiffness. The self‑adaptive lumbar hugs your lower back like a second pair of hands, while the 3D wide headrest and 8D armrests melt away shoulder tension. Recline smoothly to 135°, lock in your favorite angle, and stay focused from morning coffee to late‑night gaming. Less pressure, more flow.

This ergonomic office chair features a breathable mesh back for optimal airflow and comfort. It includes an adjustable headrest, lumbar support, and flip-up armrests for personalized, space-efficient comfort. Built with a sturdy frame, metal base, and a reliable level-3 gas lift, it ensures durability and stability. Designed to promote proper posture and reduce strain during long sitting hours.