Called serenity plush at sit n sleep.
Slim line quilt features quiltflex with poly backing
Temperature regulating foam with phase change technology
3 layers of medium firmness talalay latex
Heavy duty foam edge support
Transition layer of 2# plush aireluxe foam
1.8# firm foam
3.5" off 1.8# extra firm foam
I would need a little bit more information about the mattress to make any meaningful comments, help you identify any weak links in the mattress, or make more meaningful comparisons with other mattresses. The base layers are OK in terms of their quality/density (1.8 lb and 2 lb density polyfoam) but the weak link of a mattress is generally in the upper layers so this is the part where knowing what is inside the mattress is most important.
If you can find out the information listed in this article and post it on the forum (and a good retailer or manufacturer should be able to provide this to you) I’d be happy to make some comments about the quality of the materials or the mattress in general.