1. feet: single foot provided with ventilation opening, the air-condition be from the floor 2. wood: chair seat and back is plywood, back is 16mm thickness, seat is 12mm thickness, sprayed with dark cheerly paint. 3. coating: electrostatic powder coating after deoiling,derusting, acid cleaning 4. cloth: high-grade top leather, fabric, or PU(the colot can be selected), anti-staining and unfading 5. sponge: formed by high-density super-soft PU cold foaming, seat foam density is 50kg/m3. the back foam density is 45kg/m3. 6. armrest:oak solid-wood sprayed with dark cheery paint.