They would know more about their own materials than I would of course but you can see some comments about convoluted layers in general in post #2 here and about the Flobeds convoluted layer in the reply to question #4 in post #4 here.
A 2" convoluted layer wouldn’t allow you to sink in very far before you “reached” the firmer layers underneath it but according to the reply to question #2 in their blog post here … if you’ve tried their mattress with the convoluted layer and decide that you wish to exchange it then they will replace it with a solid layer of your choice between 22 and 36 ILD.