The black Tingley rubber that look like a moccasin loafer is lightweight and waterproof and stretched to accommodate mst dress and casual shoes. It comes in four stretching sizes: S (for men's size 6 and 6½ in wide width shoes), M (for sizes 7 to 8), L (size 8½ to 9½) and XL (for sizes 10 to 12). Check pulldown for current availability.