Mattress for heavy bub (Tasman ECO?)

[Misschief]

Ello ladies!

I'm looking for a new cot mattress for DS. He has one that's only 10 months old, but because he's such a heavy boy, he's worn a big dent in it. I have turned it head to toe a few times and now the dent is like a big gutter trough the middle lol.

So I'm now looking for a good sturdy mattress that will properly support his weight and back.
I was told by 1 manufacturer to not buy a latex "only" mattress as that gets really warm in summertime because it doesn't "air".
I would be looking at a good innerspring/pocket spring with a thick layer of latex on top.

I am looking at perhaps buying a Tasman ECO mattress.
Does anyone have this mattress? What do you think of it? Will it support heavy bubs?

I am also open to any other brand suggestions

[Misschief]

Bump