this kind of sofa bed spec as below:real leather,high-density sponge,frame type wood,the mattress fill in sponge,wood leg. Sofa bed Main structures:hardwood frame+high-density foam+nut-brown wood feet+top real leather.Main materials:real leather+foam+spring+solid wood.Frame:1)The frame inside is rather firm, 2)Hardwood frame in precise design,The frame is specially treated by kiln-dried, can ...