http://gossamergear.com/thinlight-insulation-pads.html

1/4" Evazote over a Neoair is my preferred setup, trimmed to fit my size L Neoair.

It's to bad our local Prolite.com went belly-up as that was the best US source for Evazote I knew of. However, Gossamer Gear has them, albeit in shorter lengths.

I put the Evazote OVER the inflatable.

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery