Hi Wrewster,
[quote]“The poly core is 6”, with 2" of super soft hd foam on top of the core and then 4" of latex, 2" of which are 26ild and 2" are 19ild. Overall a 12" mattress. It would be considered a hybrid, essentially half is polyurethane and the other half is the super soft hd foam and latex. The full latex option would be the serenity which has the latex core. Either one has a 25 year warranty."
Phoenix you couldn’t be so right to ask what’s inside of the matress because until now I didn’t have a clue this was even a “hybrid”. They had me believing this was a latex mattress, not just some parts of it. It does feel great laying on it for the 20 minutes I was there but the durability of the PU core won’t hold up nearly as good as a full latex mattress correct? This wasn’t inexpensive either for a hybrid, it was $1,799. for each twin XL at HL Stephens our local dealer here. [/quote]
The weakest link of a mattress is generally in the upper comfort layers which are more subject to the constant compression forces that come from sleeping and not the deeper support core in the mattress (see the foam quality guidelines here).
Restonic is a licensee group of private factories that often make their mattresses differently in different areas of the country but in some areas the Restonic latex mattresses or latex hybrids commonly use two or more inches of lower density polyfoam above the latex in the quilting layer which is more than the guideline of “about an inch or so” that I would normally suggest and would be a potential weak link in the mattress in terms of durability.
If there is 2" of polyfoam in the top layers of a mattress I would want to know the density to confirm that it was at least 1.8 lb density or higher so that it wouldn’t be a weak link in the mattress in terms of foam softening and breakdown or sagging much too quickly relative to the price you paid.
While the support core is not as big a factor in the durability of a mattress when there are thicker layers of high quality and durable materials above it that would absorb most of the compression forces that come from sleeping … I would still want to know the density of the deeper polyfoam layers as well so you can make more meaningful comparisons with other mattresses. Restonic often uses uses two different densities of polyfoam in their support layers and in these budget ranges or for someone that was heavier and more likely to compress the deeper support layers I would want to know that they were at least 1.8 lb density (or at least the upper half of the support core was 1.8 lb density). For those who aren’t in higher weight ranges or in the case of lower budget mattresses where there needs to be some tradeoffs between durability and price then 1.5 lb density would also be suitable for a base layer as well as long as someone wasn’t in a higher weight range that would compress the deeper layers more than lighter body types.
There is also more about polyfoam/latex hybrids vs all latex mattresses in post #2 here.
There are some “all latex” mattresses that are in a similar budget range to the latex/polyfoam hybrid you are looking at and there are some latex/polyfoam hybrids that would be significantly less…
Phoenix