In reply to ElBarto:
Another vote for the Evolv Cruzer or Cruzer Psyche. They are comfy, light and climb well, or in the case of the original version climb extremely well, albeit with a much narrower fit and less rubber protecting the upper around the toes.
I'm currently on my 3rd and 4th pairs, with a 5th pair sitting in the cupboard for when one of them wears out.
The only downside is that they aren't remotely water resistant...