portion of device portion 4, which material aids in the mounting of the device portion 4 to a mounting device, such as a door, as will be described in greater detail with respect to FIG. 6.Referring again back to FIG. 1, in that event that during the tension phase of the resistance band exercise device 2, the elastic bands 6a or 6b, or one of their mountings were to suffer a failure, the cupped o