Mattress Forum

We've just bought a memory foam mattress.  The guy in the shop told us that memory foam is always extremely supportive of the back, and that the firmness didn't matter.  We should choose which mattress we felt comfortable on - firm or soft - and as it was memory foam it would support the body well regardless of our weight.

My wife and I are both very light - around 9 stone - but still went for the firmest mattress because that's what we like.  I am very comfortable on it, but my wife is not sure (it's hard to tell as she wakes many times each night with a crying baby).  But someone else told us that lighter people should go for a softer mattress, else there could be problems with the back.

Is this true?  Should we exchange the mattress to avoid problems later, or is this not true in the case of memory foam.

Thanks

Guy