594924 A diaper sheath comprises a shell having an inner panel and an outer panel, with each of the inner and outer panels having a front portion and a back portion. Each panel is attached peripherally one to the other in matched contour to form a front edge, a back edge, and a first side edge and a second side edge. A first intermediate pocket 105 and a second intermediate pocket 107 are set along the first side edge and the second side edge respectively. Each intermediate pocket has at least one opening. A first intermediate strip 1810 and a second intermediate strip 1812 are set inside each of the first and second intermediate pockets respectively. The first and second intermediate strips each have an anchor portion attached to an attachment ring, and an elongated portion having a loop formed through a slide. The loop passes through the attachment ring and has a continuously adjustable length selected by moving the slide to a desired position along the elongated portion.