Hi CNJ,
My guess is that your mattress is probably either the Allura or the GrandBed but your law tag should have the specific model listed on it. Either way … both of these use good quality and durable materials although as you know they are not particularly good “value” compared to other mattresses that use similar quality foams in similar layering and amounts.
The issue of the “safety” of a mattress is a controversial one and will end up leading you down a rabbit hole of conflicting information and opinions. You can read more general information about natural, organic, green, and safe materials (all of these have very different meanings) in post #2 here which also links to another post with much more detailed and specific information as well.
In practical terms and for most people … the memory foam guidelines that are in post #10 here would be 'safe enough" but the question of “how safe is safe” needs to be answered by each person on an individual basis.
They use CertiPur certified foam so they would meet the safety guidelines I use from this perspective yes. Of course this doesn’t speak to the quality of their materials which can be determined by finding out the density of all the layers in their mattress and both safety and quality are separate from how a mattress “feels” as well.
You can read a little more about the different ways to “match” or at least approximate two different mattresses in post #2 here.
If a mattress “matches” your mattress in terms of your individual subjective perceptions of its “feel” and the quality of the layers are acceptable to you (you would need to know their density to know this) then this may be close enough for the purposes you mentioned. A mattress can match another mattress in terms of how it feels for a particular person even though it doesn’t use the same quality/durability materials (you can’t feel the quality of a foam and even low density foams can feel similar to higher density foams in certain combinations).
To find other mattresses that may “match” your Tempurpedic in one way or another (feel or quality of materials) would involve calling the retailers in your area and letting them know which Tempurpedic you were trying to match and then seeing if their answer gives you enough confidence (and specific information) to justify paying them a visit and testing their mattresses. I would make sure before you visit them that they are both willing and able to provide you with the foam densities of their memory foam mattresses so you can determine their quality and durability of any mattress where the “feel” matches what you are looking for.
The question I would be asking on the phone would be something along the lines of …
“I’m looking for a memory foam mattress that feels similar to the Tempurpedic … (fill in the name of your mattress) and that uses similar quality materials … do you have anything like this?”
If they indicate that they may … then the next question would be …
If I test this mattress and it seems to feel similar to me … do you have and disclose the density of all the memory foam and polyfoam layers in the mattress and can you confirm before I go there that there is no memory foam in it that is less than 4 lb density?
If the answer to both of these is yes … then it would probably be worthwhile to pay them a visit
Some of the better online sources for memory foam mattresses are listed in post #12 here. A discussion with some of these may also be well worthwhile because they may not only be able to approximate the 'feel" of the Tempurpedic mattresses (in most people’s perceptions) but the quality of the materials at a significantly lower price as well.
Hope this helps.
Phoenix