I have been super happy with the First Ascent Stretch Fit hiking pants: Men's Stretch Fit Hiking Pants - First Ascent
Comfortable, fitted, reasonably breathable and way more durable than I expected. Been bashing through fynbos for 2 years and they don’t show any signs of slowing down. “Fancier”, cotton-based hiking pants just get shredded in the fynbos. I’ve worn through 2 pairs of Prana Zion stretch pants, due to off-trail walking.