Banana Republic used to sell real army surplus items in its catalogs. The “NATO fatigues” had everything you could want: Olive drab, warm wool flannel, functional cargo pockets. Helped me win “best dressed” award on one dig. Dry clean only, I think, but you didn’t need to wash them because if they got covered in mud, you just let it dry naturally. The mud would magically fall off, leaving the pants looking like new.
There is, of course, a site devoted to the vintage Banana Republic catalog: Abandoned Republic, where we find those pants were only $18 in 1986: