I wear polycotton hiking pants, own brand from a big outdoor gear chain. They are slimmer cut than the big brands, esp behind the knee and have smaller and closer cut cargo pockets, so no bellowing in the wind.
I use them from -5 to +25C, with extra layers of rainpants where needed.
On dress down Fridays, I just wear them all day, same as weekends.
Cycle-features can be over-stressed and you pay for them.