To make my own recommendation along these lines, Bluffworks pants: https://shop.bluffworks.com/pages/technical-pants I've found them excellent for travel because they remain wrinkle-resistant and looking like I've just stepped out of an office no matter what conditions I put them through, up to and including a month backpacking with constant wear on hikes and irregular sink-washing.
They may not be 'military grade', but I'd say that clothes designed to look like freshly-pressed office wear after a month spent backpacking broadly count.
