1. Fabric: Made of high-grade microfiber leather, which has been treated with liquid color dipping and moisture-proof, anti-fouling and other processes. The leather surface is softer and more comfortable, has good luster durability, fine texture and is elastic. 2. Solid wood board frame: high-quality imported hardwood with a moisture content of less than 9% and 5mm multi-layer plywood, which has been treated with insect-proof, anti-corrosion and other chemicals. 3. Sponge: Dupont's PU molded foam 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. Backrest density ≧27kg/m3, seat cushion density ≧36kg/m3, resilience ≧35%, tensile strength 95kpa, tear strength 3.3N/cm, elongation at break 185%, indentation hardness 190N. 4. Craftsmanship: Ergonomic design, comfortable to sit on!