Whitewavemark2
Actually the cosiest bed I can remember was staying at my aunts Cornish home. She had feather mattresses, think a very substantial duvet which sat on coiled spring metal base that creaked. So you sank into this and it surrounded you - incredibly cosy and warm. Probably medieval in origin😄😄.
My grandmother had feather mattresses on all her beds, on top of a thinnish ordinary one. They were fantastically comfortable, when my grandpa died I kept the one from their bed. However I doubt it was very good for her asthma.

