●From December 1, 2021, Sakamoto House has been changed to Balance Lab. Please see the BALANS LAB store for more details ●Structural Components: Frame: Beech laminate wood, Legs: Beech natural wood, Seat, Upholstery: 100% polyester (*New upholstery type), Cushioning Material: Urethane foam, Surface Treatment: Urethane resin coating ●Upholstery: Amunsen fabric: Balance Easy upholstery is made up of "Amunsen fabric". (The color is the same as before) "Amunsen Fabric" is a fabric with an irregular and intricately cross the length and location of the warp and the weft, creating fine grooves like a pear-skin on the fabric surface, creating fine shadows ●Size: Standard frame: Width 20.9 inches (53 cm) x Height 21.3 inches (54 cm) x Depth 24.4 inches (62 cm) - Short frame: Width 20.9 inches (53 cm) x Height 19.3 inches (49 cm) x Depth 24.4 inches ( ●This product is manufactured under license with the Norwegian Balance Management Company, an international license to balance theory. Please be aware of counterfeit products