Yeh, in fact #1 wife made me a “windproof” from parachute material which I wore on ex for years. Very warm and very light.It would have been better to try the Pitts Road Det. and much closer than Watchfield in those days.
Silk parachute material? You would have been seriously disappointed; the material would have been a nylon based material of different 'thicknesses' relative to it's positioning either on the periphery or vent. Good for 'zoot suits' as you well know. Point taken though on your material description.