Hi The Riddler,
You’re most welcome.
Thank you for that clarification. I would contact Dreamfoam directly and explain to them the issue (it seems to be a defect but I don’t want to speak for them) and if they decide if that is the case they would most likely send you out a new model. You could also request that your trial period begin anew, as you haven’t had the mattress too long nor been able to test it out as it was designed, and hopefully they would be accommodating to your request. Their customer service is quite responsive.
ILD refers to Indentation Load Deflection, which is what we would use to gauge the “softness” of the foam. It is not an indicator of durability. That would be most closely associate with density in polyfoam (higher density is generally more durable). A 12 ILD would be plush and would refer to the high-performance Energex Gel polyfoam upper layer in the mattress, if that is indeed the correct ILD. IFD/ILD is discussed a bit in this article from the Polyurethane Foam Association.
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It would create a different feel overall, and would take some of the wear off of the former top layer of the mattress as the uppermost layers within a mattress are subject to the most mechanical stress. The concern would be that you still have an appropriate “comfort cradle” for your personal preference and that there is enough support for your BMI.
You are correct, it really does depend upon the materials. The thickness of a mattress is really more of a by-product of the mattress design itself. The thickness of a mattress is just a side effect of the design and by itself isn’t particularly meaningful because whether a thicker or thinner mattress would be better or worse for any particular person will depend on the specifics of the materials (type, firmness, etc.) and on all the other layers in the mattress. Thickness is only one of many specs that are used to make different mattresses that perform and feel differently and that makes a mattress suitable for one person and not another. There is more about the effect of thickness in post #14 here. Regardless of how thick or thin a mattress may be … the most important part of the “value” of a mattress is how suitable it is “as a whole” for your particular body type, sleeping positions, and preferences in terms of PPP (Posture and alignment, Pressure relief, and Personal preferences) regardless of how thick it may be.
The main benefit of a thicker latex mattress (or any mattress that uses similar materials) is that it can be more adaptable for heavier weights and multiple sleeping positions. It will compress from softer to firmer more gradually which means that there is more “range” of compression without the mattress becoming too firm for heavier weights (or parts of the body). A thicker mattress can also be part of a specific design that requires it such as some types of zoning or layering that needs more layers to accomplish the design goal of the mattress. It can even just be a matter of preference rather than “need”.
If you can imagine for example a 2" layer of polyfoam on the floor you would compress it to its maximum and feel much more of the floor (it goes from soft to maximum compressed firmness within the space of a 2" layer) but if you had the same softness of polyfoam in a 6" layer on the floor … it would feel much softer and compress more gradually and to a lesser percentage of its overall thickness and wouldn’t reach the same level of firmness or “bottom out” (which means reaching the maximum level of compression or firmness that a layer or a mattress can effectively achieve).
Going from the 8" to the 10" Artic Dreams will add .5" of the Energex Gel polyfoam, and 30% more (1.5") to the polyfoam support core. I don’t know that there is a difference in the ILDs, but a difference from 10 to 12 wouldn’t generally be noticeable. The larger difference would be in the extra .5" of foam on top for plushness, with a bit more noticeable support with the thicker polyfoam core.
No. I would check out some of the options linked to in the foundation thread post I mentioned in my previous reply.
Phoenix