Originally Posted by MacEntyre
I give layered IX some loft by putting 1/2" longitudinal, non-tapered pleats in the middle layer. (A 1/2" pleat takes 1" of width out of the fabric.) They are about 4" apart. The pleats tend to lay down, but they provide spacers that are more than twice the thickness of the Insultex, and serve as stand-offs for the adjacent layers.
Brilliant! Such a simple solution to the need for an air gap. Thanks for the description.