Comment by lucideer
3 months ago
MA-1s are inner lined with a 100% cotton/wool mix. The outer is nylon because synthetic fabrics are generally good for waterproofing (waterproofing is always a trade-off of quality over function) & also just because bombers are generally nylon, but a big part of their construction is using quality non-synthetic fabrics wherever they can to ensure overall quality.
I think nylon was probably also chosen for the MA-1 because of it's light weight and flexibility over the leather jackets it replaced for pilots.