Neoprene booties that wrap around your shoes and ankles, fastened with Velcro. These keep my shoes and feet dry while commuting in the PNW winter. A little water gets in through the hole on the bottom for clipless pedal cleat access, so the sole gets wet. A little more water seeps down my rain pant leg, under the bootie's cuff. But I arrive at work with my shoes no wetter than if I walked from my door to a car in the rain. I wear the same shoes at work all day.