Ergonomic chair – this model includes height adjustable arms, adjustable lumbar, pneumatic seat height adjustment, recline tension adjustment, flexing back with mesh upholstery and upholstered seat All day comfort and back support – back technology features an innovative geometric design providing appropriate support for each part of your spine 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