Hi Mary,

Thanks for your question.

13.5g will be more forgiving and I think the 12.5 may be on the firm side for him.

What I would do is to spend around £100 for the mattress and spend the additional £50 on a topper / comforter. There will be no doubt that there will be minimal fillings in the mattress but more than enough support for your son's weight. The topper / comforter will provide the comfort he will need.

Combine the two together with a waterproof protecter if bedwetting is / may be an issue.

If budget is an issue the use of a basic Tesco duvet laid on top of the mattress and again held together with a protector will provide adequate comfort for him and can easily be economically replaced whilst keeping the mattress in good condition.

With ourselves we would usually recommend something like the Origins Comfort 1000 or Artisan Luxury for that age and to allow growth with the mattress. The reason for these models being recommended is that they are the softest models we offer with the Luxury being the softest overall. At that age they do generally need something soft.

Hope this helps Mary and so sorry to hear of your loss.

Kind Regards, John and Ryan.