Ergonomic chair: adjustable seat depth, 4D adjustable armrests, height adjustable backrest, adjustable lumbar support, height adjustable pneumatic seat, adjustable tilt tension, 4 recline positions, upholstered back and seat All-day comfort and support: The patented synchronized tilting mechanism comprising two separate backrests adapts to the body shape of the user and supports the spine in all postures Fame Fabric is 95% Wool, 5% Polyamide (OEKO-TEX and EU Flower certified), Abrasion Martindale 120000 cycles EU Flower certified), Abrasion Martindale 120000 cycles Wheels: best suitable for hard floors (parquet, tiles, etc.) or soft floors (carpets) Easy to assemble: 12 years manufacturer warranty; Made in France