1. Fabric: Select the first layer of yellow cowhide, which is treated with liquid coloring, moisture-proof and anti-fouling processes, making the leather surface softer and more comfortable, with good gloss and lasting gloss, delicate texture and elasticity. 2. Solid wood board frame: High-quality imported hardwood wood with a moisture content of less than 9% and 5mm multi-layer plywood, which has been treated with insect-proof and anti-corrosion chemicals; 3. Sponge: DuPont's PU molded foamed high-density sponge and high-resilience sponge are used. There is a protective surface on the surface, which can prevent oxidation and shattering. It will never deform after HD testing. The backrest density is ≧27kg/m3, the seat cushion density is ≧36kg/m3, the resilience is ≧35%, the tensile strength is 95kpa, the tear strength is 3.3N/cm, the elongation at break is 185%, and the indentation hardness is 190N. 4. Process: It adopts ergonomic design and is comfortable to sit on!