Hello, our current king size mattress is long passed its comfort from its first purchase many years ago. Recently my wife and I have been complaining of aches and pains possibly of poor rest. Our mattress is a Reylon brand or make with 1200 hand nested pocket sprung with a pillow effect on the upper surface fitted with reflex foam. The mattress cannot be turned over but can be turned 180 degrees on occasion. Do your mattresses have a similar maintenance? We have almost forgotten just how comfortable the mattress was when first bought. A similar or improved level of comfort would be , we expect , something we would be looking for. Perhaps in the medium range. We are of average weight and build for our ages , I am a male of 63 weighing 13 stone and my wife is 60 and weighs roughly 11 stone ( I hope I got that right !!! ) Thanks. Kevin