Materials: 1. Backrest: Heatless Korea mesh(KM-03). 2. Seat: Genuine leather with high elastic sponge. 3. Base: Chrome pleted cantilever. 4. Lumbar cushion: Oblong shape fabric with sponge. 5. Lumbar support: Silver sprayed aluminum. 6. Armrest: Genuine leather cover. Functions: 1. Lumbar cushion: Adjustable(up & down) 2. Armrest: Height fixed.