It doesn't get much more summery than these Tia melon orange sandals from Kork-Ease!  Brushed leather upper with grommet details.  Adjustable buckle.  2.5 inch heel on comfy Kork-Ease sole.  Runs slightly large, consider ordering one size smaller than usual.

Leather upper.  Balance of man made materials.

Kork-Ease does not treat their natural, full-grain leather with abrasive chemicals.  They also hand finish each pair.  Because of this, variations in the leather grain and color are perfectly natural and celebrated.