I'm going on a work+holiday trip somewhere hot and humid, there will probably be a lot of walking (including for the work part). As I always prefer to travel light, I am looking for a pair of smart-looking but comfortable and breathable ballet flats or pumps. Extra points for packability and being able to go in a washing machine.
I was looking at something like these Allbirds or Vivaia ones - but (1) are they worth the price, (2) have I missed any equally good options?