Our GOOD mattress is the beginner plush/firm bed in our lineup. It is designed around a 13.5 gauge 390 coil spring set with cotton pad protection on both sides of the coils. The innerspring pad is followed by a half-inch layer of comfort foam and topped with quilted cotton. Then a 1.125 inch sheet of soft comfort foam is inserted. Finally the fine damask cover is quilted to create a great plush/firm starter mattress.