We’ll, Dahlia’s Natura mattress pad that I have as #1 in my OP was made out of Natura’s proprietary Smart Wool. Which in Phoenix’s post #3 here is Merino wool with a special treatment to make it washable…
And Dahlia’s Natura mattress pad was too firm for her, so maybe it’s okay for me?
I just put in an email to Natura trying to verify what Phoenix said in that post. I also asked them if the treatment they put on the Merino really firms it up or not… Their site says they’ll respond in 2 business days… maybe I’ll call them Monday.