These shoes, which consist only of an insole, expand and contract to fit one's foot size at the
push of a button. There are buttons to change the shoe into one of three shapes: a
comfortable slipper style, a sneaker style suitable for jogging, and a stylish dress shoe style.
There's no need to change shoes, and you can even choose and change the color from five
options at will. It's a convenient shoe, about the size of a small key, with buttons that let
you choose the desired shoe shape and color.