Gee, here’s weird. Okay, I’m sleeping on the floor with a big double duvet folded in two – on half and under half. If I have a self-inflating 7.5cm camping mat underneath (so not mega-padding), when I get up in the morning I have double bags of fluid under both eyes and a kind of dewlap that I thought was fat on the front of my throat. And some fluid retention to my ankles and abdomen.
If I take the camping mat away and have nothing but plain floor under the single-thickness duvet, in the morning I have no fluid retention to ankles and abdomen, nor on my throat (so it must have been fluid not fat – I guess the sinuses drain via there) and under my eyes is just wrinkly.
Floor sleeping affects lymphatic drainage that much! Who would have thought it?