Metallic frame, knock down structure, "Intelligent System" comfort to be choosen: soft, middle or firm. Double seat inclination: you can choose 2 options, horizontal or inclined. Seat in 100% down feather with interior in double "Viscoelastic" (extracomfort 55 Kg/m3 "memory foam" polyether), back in polyether, kidney cushions in down feather/fiber. Completely removable covers.