Yes it's another Covid project but at the moment it is only a thought experiment.
I need and want a new half sack having sold the Red Rabbit one that didn't work for me as the shell was far too breathable [ ie: not windproof at all] and because it is for Australia and snow I want this to be in Synthetic insulation.
I have all this 3M LiteLoft in 40GSM and it needs to be scrimmed and stitched at 200 to 250mm intervals
I don't want stitch lines on the shell if it can be avoided.
Now 40GSM isn't enough insulation to survive a night out without a lot of shivering so I would need to use 2 layers which would be OK and about 1.8Clo.
That's way short of the 6 to 8 Clo needed for sleep and comfort but it should be enough to stop me freezing to death as I'd normally be wearing aout a Clo with the combination of tights and windproofs, and I would naturally also have a bivvy sack for another possible 5C of protection.
My thought experiment is to get some mosquito netting or similar UL material from Spotlite and put it between the two layers of LiteLoft and hand stitch each layer in alternate lines and then use it as you would APEX, just edge stitching.
I can't use the Thinsulation I have because that is not easilly compressable
Thoughts?