I have just seen an advert for a mattress that arrives in a box, rolled up! I never imagined such a thing. I'm a pocket sprung sort of chap (Vispring, thank you for asking) and cannot believe such a mattress is comfortable. I'm flabbergasted.
How long have these mattresses been on the market? Have you got one?
We have limited headroom on our staircase and cannot get a standard mattress up without twisting it before it even gets to the bedroom. Have bought the roll up ones for years and find them very comfortable.