. . . "In addition, FIG. 17 shows how the sandal strap 78 may be affixed by a swivel, as at 79, to the back end of the sandal sole, as at 80, so that when the fastening means, such as Velcro, arranged at the frontal edge of the strap 78, as at 81, is opened, the strap may be pivoted in place, to expose its reverse side, and to change the appearance and aesthetics of the sandal, upon which the structure a" .