Triangular shaped seat design for optimal ergonomics. The curved base responds to any shift in weight, activating core and upper legs. Standard size / adjustable height: 58 - 82cm. Perfect for all user heights. Natural Wood (ECO) or High Pressure Laminate base.Ergonomic design and high-quality craftsmanship. Versatility, with full movement range. High-quality pneumatic seat height adjustment. Easy to move: lightweight, with a groove around seat for carrying. Knit Microfiber: 97% polyester and 3% spandex, thread according to Oeko Tex 100, color fastness in accordance with automotive standard, withstands 40,000 abrasion-resistance test cycles.