We are getting to ready to move so I was throwing out a twin mattress when I looked underneath. I saw the wonderful Lutradur lining the bottom of the box spring! Tore that off. Then I saw as padding under this cheap Sam’s Club mattress was some gorgeous industrial felt about 5 yards of it so I cut off the top, took the felt out and voila free batting. A little shaking, vacuuming and sunshine and we’re off! You just never know.