1. Fabric: High-quality imported Porsche Naxi leather + linen velvet. 2. Structure: Imported solid wood frame. 3. Spring: High-quality carbon steel serpentine spring. 4. Filling: Seat cushion 45° high-resilience sponge, backrest filled with technological down and nano-resilience particles. Backrest/armrest: 35° sponge with moderate hardness. 5. Tripod: Thickened steel plate computer cutting, cold-rolled one-step forming, black sandblasting surface anti-rust and anti-oxidation treatment.