Thanks for your question.
At your body weights we would match you both with a Medium spring tension to get the correct support;
|Upto 8 Stone / 50kg||Soft
|8-16 Stone / 50-101kg||Medium
|16 Stone / 101kg Upwards||Firm
Side sleepers in general need to avoid anything too firm in the top layers as this will only serve to cause pressure point pains in places such as hips, shoulders and knees.
As such, have a look at something more medium feeling in the top layers such as our Origins Pocket 1500
or Artisan Naturals
The main difference here is that our Artisan range is constructed with natural fillings; Those fillings not only last longer as standard but also provide a cool sleep surface. Both of those models will give you a a slight sink into the top layer but not too much.
Both of those mattresses can go on to your slatted base as the gaps are less than 3″. You might just want to place an old duvet on top of the slats to protect the mattress from splinters, indentation or damage.
I hope this helps but if you have any further queries please don’t hesitate to contact our office on 0161 437 4419.
Kind Regards, Lee.