NAF (N-1) New jacket being reproduced.

[asiamiles]

For the cloth, i tend to agree with Grant that the jungle cloth is so densely woven that it naturally exibit some water repellent properties - not spray-on finishes. As U can see from the listing of the original, there are serious water marks left after laundry for that specimen. Also, i think all old deck jackets has a wind-proof layer inside the alpaca lining. So, in the old design, the designer had used material & constuction method to make it a water resistent & wind-proof garment suitable for its purpose.

Interesting point about Bedford Cord having some resistance to water; it would account for its consistent use by the Navy yet being ignored by the Air Force and Army.
I'd initially read and always assumed the interlining was to prevent water seeping through so it's interesting to read that it functioned to keep the wind out.