Hi 901-Memphis,
Thanks for the information but the ILD of the individual layers really isn’t all that important to know because they don’t have anything to do with the quality of the materials and they also won’t tell most people anything about whether the mattress is a good match for them in terms of PPP.
ILD/IFD is only one of several specs that makes one material feel softer or firmer than another (see post #4 here) and the ILD or IFD of different materials or even different types of the same material (such as different types and blends of latex) aren’t directly comparable to each other anyway (see post #6 here). The ILD or IFD of single layers or components also isn’t particularly meaningful because every layer and component in a mattress (including the base layer and the cover and quilting materials) will have an effect on the feel and performance of every other layer and component and on the sleeping system as a whole and putting too much focus on ILD/IFD or thickness or any other single specification (especially if it’s only a single layer or component) will most often be more misleading than helpful.
While knowing the specs that can affect the quality and durability of the layers and components in a mattress is always important … unless you have a great deal of knowledge and experience with different types of mattress materials and components and their specs and different layering combinations and mattress designs and how they combine together and can translate them into your own “real life” experience that can be unique to you (which would generally be a very small percentage of people) … I would tend to avoid using complex specs to try and predict how a mattress will feel or perform for you. When you try and choose a mattress based on complex combinations of specs that you may not fully understand or only based on specs for single layers or components that may not be as relevant or meaningful as you believe it is then the most common outcome is “information overload” and “paralysis by analysis”. Even the best mattress designers in the industry are often surprised at what a mattress they design “should have felt like” based on the specs when they design it and what it “actually feels like” when they test out their new design.
Phoenix