1. Sofa internal frame: Pine + three layers of solid wood + snake bullet spring + paper wrapped steel wire + elastic band + cool cloth, sofa leg is ash wood.
2. Cushion filler: Doll cotton + White Goose Down + sponge.
3. By packing filler: Down + doll cotton.
4. Armrest filler: Down + doll cotton.
5. Flannel fabric, not removable and washable!
6. Connection of the sofa: crocodile mouth.