These polyamide booties, designed to be used with your civvy shoes, are like little kagouls for your feet.
The fabric has a waterproof polyurethane coating, the seam is sealed and the top cuff is elasticated so none of the wet stuff ever got inside during extensive testing in the rain. Elasticated straps around the base of the foot hold the overshoe in place while poppers and a Velcro strip ensure it stays firmly closed.
The open sole allows you to walk normally in these, although you'd want to keep it to a minimum to avoid damaging the straps. Extra visibility comes from the reflective tabs and piping..