Actually that is 85% Synthetic Latex and 15% Poly Dunlop is the manufacturing process and it is the cheaper process due to the foams being inconsistant. Dunlop process is usually used to make foam cores and not very good as a sleeping surface. That type of mattress you can get from mattress discounter for $699 to $799 anyday of the week.
Hi Dave. All three of these latex mattresses are Dunlop, which refers to the vulcanization process. Neither dunlop/talalay is necessarily better or worse, but each results in a different feel, for which preferences will vary per individual. Now as to what percentage of natural latex each one contains, that is a separate issue from dunlop/talalay, & these three vary as follows in that regard:
Elsfjord 5" - 100% synthetic http://www.ikea.com/ca/en/catalog/products/00139969/
Engenes 7" - 85% synthetic/15% natural http://www.ikea.com/ca/en/catalog/products/80139994/
Edsele/Erfjord 7" - 85% nautral/15% synthetic http://www.ikea.com/ca/en/catalog/products/70188471/
The edsele so far is amazing, & btw is the only one of the three that isn't roll-packed, which is nice & somewhat unusual for most foam (since it costs more to ship this way); though even their thinner synthetic elsfjord I've had for a little over two years now, & it has been very impressive as well. I have since transferred it to another mattress project now that I'm testing out the edsele, & will keep the forum updated as to how it holds up in comparison. The only shame with these is they come with such nice mattress covers that are generally wasted on me. Since I prefer a more immediate interaction with the latex, the first thing I do is replace these thick covers with an ultra thin (but less protective) one. I do like their effect over memory foam though, & will use the especially nice cotton/wool case that came with the edsele for that purpose.
This message was modified Jan 19, 2012 by JasonRatky