Hi diversification,
I’ve made a few comments that may be helpful in your research.
While the specs don’t include the thickness of the pocket coil so you can’t confirm that they add up to the thickness of the mattress … there is only 1" of polyfoam that is less than 1.8 lb density (and it’s 1.5 lb) so based on the specs that you listed there would be no cause for concern or “weak links” in the mattress.
This mattress has no lower quality materials or weak links in the design at all so with the materials that are listed there would be no cause for any concern here either.
Same comments as the Heavenly Cloud Soft…
A foam encasement is used around a support core (either an innerspring or in this case latex) to create a firmer edge and is the same thickness as the support core itself so it isn’t a separate layer in the mattress. The missing 2" would include the thickness of the fire barrier, the cover fabric, and any other layers that are missing from the description. I would also want to know what they are as well.
Again the encasement is polyfoam that is wrapped around the edge of the support core to create a firmer edge and isn’t a separate layer. The thickness of any polyfoam in a mattress isn’t an issue if the polyfoam is a good quality and durable material. It’s only an issue if the polyfoam is a lower quality./density material.
The price of a mattress is certainly an important part of the “value” of a mattress purchase but it is only one of many. There is more about the most important parts of the “value” of a mattress purchase in post #13 here that can help you make more meaningful comparisons between mattresses.
The first step is to eliminate the worst choices and to narrow your choices down to a specific finalist at each of the local or online retailers or manufacturers you are considering.
Once you are down to finalists that are all choices between “good and good” and you are confident that they would all be a suitable choice in terms of PPP and none of them have any lower quality materials or weak links in their design and if there are no clear winners between them then you are in the fortunate position that any of them would likely be a suitable choice and post #2 here can help you make a final choice based on your local testing or mattresses you have slept well on, your more detailed conversations with each of them, your confidence about the suitability of each one, their prices, the options you have after a purchase to change the firmness or exchange or return the mattress, any additional extras that are part of each purchase, and on “informed best judgement” based on all the other objective, subjective, and intangible parts of your personal value equation that are most important to you.
Phoenix