I realize that this doesn’t address your specific question, but I replaced my rear cushion with 4” "Lux Foam-High Quality" from the Foam Factory.  I love it.  Good support.  It was a bit over $80, or less than a good topper. When I reupholster, I’ll replace the seat cushions with it as well.

Jim

> On Jun 1, 2018, at 6:13 AM, Richard Thorpe <rthypno@YAHOO.COM> wrote:
> 
> 
> 
>   ----- Forwarded Message ----- From: Richard Thorpe <rthypno@yahoo.com>To: Automatic Digest Processor <listserv@gerry.vanagon.com>Sent: ‎Thursday‎, ‎May‎ ‎31‎, ‎2018‎ ‎06‎:‎59‎:‎05‎ ‎AMSubject: new foam for upper bed
> Thinking of replacing the foam in my 1990 Westy's upper mattress. Would prefer something non-toxic and super comfortable. Hoping for some suggestions.
> 
> 
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