We have designed a very unique clip and rail system that surrounds the outer edge of the shoe base. The idea is to clip the straps into the optimal position around your foot for best fit, which is seen only from the bottom view, to accommodate you unique feet. This allows for any swelling that many women experience throughout the day.. The clips tuck away into the sole and offers the ability to mix and match straps of different colors and styles for multiple looks. The rail system allows women with slightly wide feet or podiatry issues like bunions, to adjust for better fitting straps.