For a holiday in a hot city, will be touring on foot. I think linen/cotton is going to be the best option.
I'm looking for a knee length shift, very simple shape, either cap sleeve or sleeveless, but I'd like some shaping/darts at the waist. Otherwise, the usual linen tunics just hang and look like a sack.
I like the button through linen dresses or just plain. It's the bit of shaping through the waist that makes or breaks it for me.