( Ergonomic Design ) FelixKing’s office chair is designed by adopting ergonomic structures. Featuring reliable headrest, armrests and lumbar support provide comfy experiences after sedentary work fatigue. Curved hollow seat with breathable mesh, tilts the center of gravity back and allows air circulation. ( Adjustable Armrests Headrest ) 3D adjustable armrests allow your arms to put in a comfortable position. Big curved headrest increasingly connects with your head and neck, satisfying people of different heights to relieve their pressure. ( Unique Backrest Lumbar Support ) Reclining high back is designed for two separate single parts and strongly supports your spine and allows for perfect posture, releasing your lumbar force for a long time sitting. ( Durability Roller Blade Wheels ) The high-quality foot rack supports up to 300 pounds and keeps you balanced. Roller Blade Wheels provide smooth and silent rolling, which swivel multi-directional freely and cause no…