Looking to replace my mattresses, they are on a SKS slatted base

Would your latex mattress be suitable for the slatted bases and which would you recommend we have just been away and my husband loved it we had a good look and it said it was a water latex ortho 5 firmness 3 .I also slept well although I did sleep on top of the covers with another duvet folded in half which is how I sleep at home due to joint and neuropathic pain .this was on
I also slept well although I did sleep on top of the covers with another duvet folded in half which is how I sleep at home due to joint and neuropathic pain. This was on slats as is our bed so would be looking fit 2 x3 ft x 6ft 3 inch .
We also bought a Vispring topper very expensive and I can't sleep on it as it hurts so that is below all my padding !!I would be really grateful if you could recommend something from your range .
I think I have resigned myself to always having to sleep on padding my husband is a little over 13 stone and I vary from 9.8 to 10 stone.
Any advice would be great as I have read a lot of latex isn't natural but I believe yours is.
 
Many thanks Jane Padgett