Hi Lynne,
You can see the details of the fire barrier on the PLB site here.
If you mean the PLB toppers … they are all made from Talalay latex even though they make several different types (blended Talalay, 100% natural Talalay and Talalay GL slow and fast response latex)
They are all different versions of Talalay latex.
I would definitely include them in your research. mark is very knowledgeable and they have some good quality/value choices.
Cozy Pure is one of the manufacturing members of this site which means that I think very highly of the quality and value of their mattresses. They are not the least costly option but I know that Cheryl pays attention to every ingredient she puts in her mattresses … right down to the last thread. You can read more about them here (be aware though that the membership discount only applies to mattresses purchased directly from Cozy Pure because the Organic Mattress Store is not a member here).
You are certainly looking at some high quality choices. The best advice I can provide is to make sure you test very carefully and objectively so that the mattress you choose is suitable for your needs and preferences and has the best possible PPP (Pressure relief, Posture and alignment, and Personal preferences). When it comes time to make your final choice then I would make meaningful comparisons between mattresses and options and services offered by each merchant and then choose the one that you believe is the best value according to the parts of your own personal value equation that are most important to you.
Of course if you have more questions along the way feel free to post them here as well
Phoenix