Abstract: An improved coupling device for a slipper or sandal-type footwear having two or more coupling devices for detaching the upper shoe part from the plastic sole. The coupling devices are distributed around the edges of the shoe upper and have teeth-like prongs which mesh with resilient tongues positioned within sockets that are embedded in the sole. Buttons are provided on the sidewalls of the sole for releasing the prongs from the sockets when it is desired to exchange the shoe uppers on the sole. The coupling device has an enclosing cap that, in a method for molding, prevents flowable resin from entering the socket and the air space around the button during the resin molding process, which could render the device inoperable.