I personally dont wear flip flops unless i’m washing my Mx bike or a car or at the beach or something. Go with some espadrilles or canvas shoes if your looking to keep your feet cool.
Love the Rogues, I recommend them for your next pair. And yeah, on the belt I used Clarks beeswax. I rubbed it into the belt and dried it over the heater. I also left it out in the sun a few times.