Abstract: The hourglass-shaped insert includes a moisture permeable inner layer and a moisture impermeable layer enclosing a layer of moisture absorbent core material. Located between the cut-out leg sections of the insert and interposed between the inner layer and the absorbent material is a uni-directional moisture barrier layer and a wicking layer. The barrier layer is a laminate containing a polymer that expands when wetted and includes a plurality of apertures. Adhesive strips are mounted on the outer layer to releasably secure the insert to an undergarment.

Abstract: The cover sheet includes a moisture permeable top section and moisture impermeable side and bottom sections. The edges of the interior surface of the impermeable section overlap and are joined to the edges of the exterior surface of the permeable section to form an enclosure. A layer of a moisture absorbent core material is situated within the enclosure. A uni-directional barrier layer comprising a laminate of a base or carrier and an absorbent polymer which gels and expands when wetted is interposed between the permeable cover section and the absorbent core. The barrier layer includes a plurality of apertures which decreases in size as the polymer gels and expands.