I have some foggy recall (nothing to do with the time, date, or last night!) that Sleep Number is a Twin Cities company. They hit the local news airwaves last year during a sweeps period (always suspect). It seems there is very little breathing due to the membrane that gets inflated to give you your sleep number of hardness. There were problems of mildew in the pillow top because of that and then issues of corporate unresponsiveness -- who would
want to replace all their product because of a few hot sleepers? You know who you are!!