Hi we are looking for a mattress to go on our newly purchased slatted king sized bed frame. My fiancé is 21st and I am 13st. We have slept on a Hypnos bed in hotels but haven't a clue what model it was unfortunately and we literally sunk into it and absolutely loved that feeling - so much so we wanted to take the mattress home with us! We currently have a medium mattress which, I know on a slatted bed, feels firmer but it doesn't have that sunken soft feel to it in any shape or form and my shoulder kills me when I wake up. Can you recommend a mattress with that 'sunken' feeling in it where it quite literally hugs you? Budget we don't mind spending a lot of money as long as its not in the thousands we just want a mattress that will suit our requirements...if only I had remembered what model that mattress was! :-) Thanks