Hi nestbedding,
Thanks for letting us know the specs of the mattress (and for adding the density of the base foam on the website) … I appreciate it 
The only thing that was missing that I confirmed today was the thickness of the 3 convoluted memory foam layers which you confirmed are 2" each.
@ mikesnewmattress:
Based on the information that nestbedding provided … there are no lower quality materials or weak links in the mattress relative to more “average” weight ranges.
Convoluted memory foam would be a little less durable than a solid layer of the same material (see post #2 here about convoluted foam layers) but there is also a thick layer of wool on top of the memory foam layers which would improve airflow and temperature regulation of the mattress and which would improve the durability of the memory foam layers below it as well so overall I would only add a caution relative to the durability and useful life of the mattress if you are in higher weight ranges (more than the lower 200’s or so)
Phoenix