I have the Carlsons in sand, I didn’t think I’d ever put them into sports mode and wanted them to wear as a mule. However I ran around in them with the strap down all last summer. I didn’t find them as heavy as the Dunnet sandals (they’re ridiculously heavy but gorgeous), in fact they were very comfy from day one. Very soft suede so no blisters.
I wish I had got the Zebags instead of the Carlsons though, they just look a bit funkier imo.