Hi izzy,
The quality/density of the foam materials in a mattress are the single biggest factor in its durability and as you can see in the description here … they don’t list this information. One of the most important secondary factors is the firmness/softness of the materials (softer materials are more ubject to mechanical stresses than firmer materials). Without this information (the density of the foam) there is no way to make meaningful comparisons with other mattresses either in terms of quality and durability or in terms of value. The coils are certainly strong (12.75 gauge which are very strong coils) so they wouldn’t present an issue with good insulator materials to even out their support but the foam (or fiber) materials over them are the ones that will soften and degrade most quickly
When you see claims like this …
And if the claims don’t include the specific quality of the materials then there is no way to validate the claim which is just marketing information in that case. It is also wise to take absolute claims such as “strongest mattress on the market” with a grain of salt since there are certainly materials that are more durable than HD polyfoam.
That’s not to say that these aren’t relatively durable mattresses … only that there is no way to make meaningful assessments about the claims and no matter what the quality of the foam there are other materials that are more durable than polyfoam.
I’m not quite clear on what you are asking here. Comfort, support, and durability are not related to each other in most cases. What you need is a mattress that has support layers or components that provides firm enough support under the heavier parts of your body (pelvis) to maintain neutral alignment and comfort materials that provide you with the pressure relief you need. Whatever materials or components are used to provide this support it needs to be durable enough to maintain its firmness and stay close to its orignial properties over a long period of time. A mattress that provides you with good PPP when it is new may not continue to do so as the materials soften, degrade, or break down. You can read more about the factors involved in durability in post #4 here and the posts it links to. In other words … durability is a measure of how long a mattress continues to provide you with the comfort and support you need for restful and healthy sleep … not how long it takes for the material to break down completely. It’s also true that a mattress that provides you with good PPP when it is new will tend to break down from the top down so if the support layers are suitable at the beginning when it is new the odds are better that they will remain this way over the lifetime of the mattress because it’s the top layers that are the most likely to soften and break down.
Body type and weight will also make a big difference because the issue with mattresses (unlike elevators) is the softening under the heavier parts of the body … not the “all or nothing” failure of the whole layer (or an elevator). The parts of the mattress that are underneath the areas of the body with the greatest weight will soften and break down faster than the other areas of the mattress so even if a layer would work well for “most of the body” … if it isn’t durable enough under the heavier areas of the body then it won’t continue to provide you with the comfort or support you need because one part of your body will sink in deeper than it did when the mattress was new and you could be sleeping out of alignment.
Hope this help you make sense of your “durability” questions and how durability is related to maintaining the comfort and support of the mattress.
Phoenix