Hi Fluffhead,
I’m glad you finally got the ILD’s for the mattresses … I still hadn’t heard back.
L series plus commnts: 1" celsium/ 3" talalay/ 2" hr dunlop/ 6" dunlop
Medium Firm: 17 ILD/ 24ILD/ 30 ILD/ 38 ILD
Medium Plush: 17 ILD/ 17 ILD/ 27 ILD/ 38 ILD
The medium firm side would more typically be called soft. Latex International calls their 24 ILD soft and with an extra inch of even softer latex on top, it would definitely qualify as soft even though 24 ILD for most people is on the upper end of the “soft” range. The layers underneath this by most standards would be called medium and firm (Dunlop is more variable than a specific ILD). The plush version with 4" of 17 ILD would be too thick and soft for most people for best alignment and with your weight and your wife’s primary back sleeping this would almost certainly be the case. You are probably too far away from the support layers for best alignment and this certainly seems to confirm that a 4" comfort layer is too thick for good alignment.
L series comments: 3" talalay/ 2" hr dunlop/ 5" polyurethane
Medium firm: 24 ILD/ 25 ILD/ (25 ekg/200 newtons) the polyfoam on the bottom translates to 1.56 lb/ft3 density and 45 ILD
Medium Plush: 14 ILD/ 24 ILD/ (25 ekg/200 newtons)
The plush side is the softest talalay over soft Dunlop and as you mentioned would be too soft for most people even though the Dunlop middle layer would be firmer than Talalay in the same ILD.
The medium plush still has “soft” talalay on top with “soft” Dunlop under it. Because the comfort layer is thinner than the L plus, it is closer to the support layers and still in the range of the ILD that gives you good pressure relief. While 2" of soft Dunlop would be firmer than Talalay … it may still be a bit on the soft side with a 3" soft layer over it and along with the “dead” feeling may have been part of the reason it didn’t feel quite right. As you mentioned … the middle and lower layers here would not be nearly as lively as Talalay. This would likely be better with only 2" of 24 on top for both of you and with the “help” of the softer Dunlop under it would likely still be good for your pressure relief and your wife’s alignment. Of course the middle thinner layer of Dunlop and the firm polyfoam under it would be the reason it is less lively.
Adding in your Savvy Rest comments from before …
[quote]
I switched to the F/M/n4 bed to see the difference and I immediately felt more relaxed, while my wife got onto the n5/n5/n4. After a while we switched and I got back on the all talalay mattress. It did not feel as though it moved around as much as the F/n4/n4 from the previous day, but I think it was too firm for me. I just felt like I couldn’t sink in. Once my wife got up from the F/M/n4 mattress that she liked a lot from the previous day she told me immediately she liked the all talalay n5/n5/n4 the most which surprised me. She definitely likes the springyness and the firmness.
[/quote].
This all seems to point to a 3" comfort layer in the range of 24 ILD or perhaps slightly firmer (N3?) being better than the N4 for pressure relief.
This too seems to confirm too that firmer middle and lower layers work well or both of you with 3" top layers.
The unknown is still the effect of a 2" comfort layer and if I was to go with this for better alignment purposes than a 3" layer … I would slightly soften the middle layer compared to the N5 Talalay or M Dunlop that seemed best with a 3" comfort layer.
It seems like N5/N5/N3 in natural or the equivalent in blended talalay could be a good choice with a 3" comfort layer or N5/N4/N3 or the equivalent in blended could make a good choice with a 2" comfort layer (although this is extrapolation based on testing 3" comfort layers). Because springiness seems to be preferable, if you add any Dunlop to the mix it would likely be better to keep it to the bottom layer.
Phoenix