1. Fabric: Select high-grade microfiber leather, treated with liquid coloring, moisture-proof and anti-fouling processes, the leather surface is softer and more comfortable, with good gloss and durability, 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, treated with insect-proof and anti-corrosion chemicals. 3. Sponge: Adopt DuPont's PU molded foam high-density sponge and high-resilience sponge, with a protective surface on the surface, which can prevent oxidation and shattering. It will never deform after HD testing, with backrest density ≧27kg/m3, seat cushion density ≧36kg/m3, resilience ≧35%, tensile strength 95kpa, tear strength 3.3N/cm, elongation at break 185%, and depression hardness 190N. 4. Process: Adopt ergonomic design, comfortable sitting!