This thread suggests the R value of these is essentially the same. Is the advantage to Evazote/Volara that they are slightly lighter and more durable then? The blue stuff seems plenty durable & light to me and much cheaper. However, one downside for it is lack of packability IMHO unless you cut some reinforced slits so it can be folded like a Z-rest.
I need to get some more padding soon for my son and am trying to decide if Evazote (eg, GG Thinlight) is worth almost 4x the cost of blue from Walmart. I believe in that same thread Richard Nisley indicated the “better” blue foams will spring back after compression – I was surprised the stuff from Walmart did this.

