I'm sure Mac or one of the other IXperts will chime in... but until then...
As I understand IX from my experience, the trick is to create gaps between the layers so it traps a small amount of air.... By making the outside layer longer, and then trapping it in a smaller nylon shell, it will force it to wrinkle. That makes sense from a capturing air perspective. The only issue is it's not controlled or even....
I was thinking of sewing either small pleats down the length or width of the TQ, using the bulk of the IX to prevent the layers from touching... Sorta like:
This would force a small gap between the layers, and it would be evenly spread out...
The only concern I would have with an IX TQ is condensation...
If you wanted to make it more comfortable, I made a simple TQ and used a really lightweight fleece on the inside. It's really comfortable. Of course, that adds some weight over 1.1 nylon...
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