The most lightweight ergonomic chair – easy to move and adjust without sacrificing durability or support 4D fully adjustable armrests – raise, pivot, and shift in all directions to ensure perfect positioning for your arms and shoulders LiveBack technology for dynamic support – balances body weight and adapts to your spine for responsive comfort throughout the day Patented hybrid seat with organic movement – combines comfort edge, comfort dial, and LiveBack to enhance posture and relieve pressure Wheels suitable for all floors & easy assembly – ideal for soft floors; 12-year manufacturer warranty; made in France with premium craftsmanship