Hi dmartin1910,
Foamed rubber is made using one of two main manufacturing methods. These are the Dunlop process and the Talalay process. Either one can use natural rubber (NR), synthetic rubber (SBR) or a blend of the two. So this is 100% Talalay (latex is either 100% Talalay or 100% Dunlop because it can only be made with one or the other methods of manufacturing) but it uses a blend of natural rubber (about 30%) and synthetic rubber (about 70%). You can read about the different types and blends of latex in post #6 here. In the lower ILD’s … the blended Talalay would be a little more durable than 100% natural Talalay.
The name of the mattress should be on the law tag. The Mezzanine is a 9" mattress that uses 1" of Active Fusion slow response Talalay latex (which has a slower response similar to memory foam) over an 8" bonded polyfoam/latex core. The law tag states the materials based on the percentage weight (not the percentage thickness) so the thickness would depend on which of the materials was heavier (which is normally the latex). All their bonded cores are 90% polyurethane and 10% latex (bonded together in a resin) but would be listed under polyurethane (which is what it is primarily) and the 5% would be the listing for the 1" layer of latex on the top. The Harmony is also a 9" mattress but it has 3" of Active Fusion fast response Talalay latex and a 6" core so based on the percentages this wouldn’t be what you have.
Which mattress and what size did you buy … and was it mattress only or a set?
I would definitely call them and have them correct their delivery error.
Phoenix