Hi jlcpremier,
There are some comments about Diamond in post #2 here and the posts it links to that would be well worth reading. I had a conversation with someone from Diamond a short time ago about some new mattresses they are designing and I passed on my thoughts that it would be very helpful if they were more transparent about the type and quality/density of the materials in their mattresses so I hope that they will take the comments to heart.
I’m not so sure they are correct about whether Diamond doesn’t use any foam densities that are less than 1.8 lb density in their mattresses but either way I would want to find out all the information here about any mattress I was considering before making any purchase. It’s much less risky to assume that any “unknown density” materials are lower quality than the foam quality guidelines here than it is to assume that they meet the guidelines regardless of what the retailer may “guess” they may be.
This would certainly be long enough to tell you whether the mattress is a good “match” for you in terms of comfort, firmness, and PPP … it wouldn’t tell you anything about whether there are any lower quality materials or “weak links” that would compromise the durability or useful life of the mattress relative to your weight range.
That would be great. Without this information you would be making a risky choice.
Phoenix