mattress moisture barrier

Maybe I'm lucky, but I've never used anything like this stuff. I have the factory mattress with a 2 inch topper to make it a bit softer. I recently did lay down Relflectix just to insulate the bottom of the mattress against extreme cold, but other than that- nothing. I've never noticed any type of mold anywhere. Now I do keep a dehumidifier in the TC when not in use and it keeps it at about 50% humidity constantly, and I live in the VERY humid Houston area.