My normal flights are rarely more than two hours. I recently pulled a three-hour leg headed to central Florida and realized just how horrible the foam is in my front seats. As the flight bore on, the foam pancaked below me and left me with almost no support -- it was trying to dump me into the gap between seats.  I poked around a couple websites that sold Confor (the new name for Temperfoam) memory foam material, but ended up just driving to Spruce. They've got a sandwich of firm/medium/sof