supplex/taslan – rockywoods.
rogers suggestion of taslan/supplex, which are basically the same thing, is good. I’ve used the same sierra designs supplex pants for literal decades now, though I did have to patch the knees a year or so back, with supplex patches, of course.
The stuff is totally big sur proof, and it breathes ok in even high heat, though it’s better I think when it’s under around 80F or so. I never get cold in it walking so I don’t know what the lowest comfort temp is.
Dries super fast, is very strong, is NOT light.
I picked up what I think is a softwhell used and I sweat like a pig in it, to the degree I never use it anymore. It’s a tight fitting style though. I’d rather wear a supplex wind shirt myself than the softwhell, and the supplex will be incredibly durable.
If I were to do this, I’d pick up a cr@ppy used windshirt at a thrift store (or just go to thrift stores and look for heavy wind shirt type jackets), with the most basic construction possible, ideally one piece for each arm, two pieces for the body, and one for the hood, ad then rip the seams and use the pieces as the template for sewing a new one. I did rain pants sort of like that, and they work fine.
Other options you may not have considered are things like used army wool shirts, which would not be useable in hot areas, but would be great in cooler times. Also worth a thought as cheap and easy is just a basic shirt, made out of polyester or nylon, also via thrift stores. that’s cheap and easy, and should last you ok.
