I did trail work in the rain for a summer
Wore mostly pendleton board shirts and if it rained harder put on a Labonville wool zip mackinaw.
I had some "waterproof" tech materials, but working in the rain for 10 hours...
I wore pendelton board shirts all summer when doing trail work ac ouple of years ago. Rained almost everyday so I gave up on raingear and started wearing lots of wool.
edit: Shit, didn't see that was a spammer.