Take a look a the Superlight CT, the lightest shoe FJ makes. They are mesh, so not waterproof but very cool on a hot day.
I try to walk most times that I play. I always wear ICONs. I've never had any issues with pulling a pair out of the box and heading straight to the course. I could never say that years ago with other brands. There was always a "breaking in" period with the swoosh. You don't have that with FJ.