Abstract: An undergarment to be worn primarily by women during menstruation that resists staining of the undergarment itself and prevents leakage of menstrual flow to outer garments. The outer covering of the undergarment with a waist portion and a pair of leg openings is composed of fabric to make the fabric repel stains, repel and release stains, or absorb and then release stains. A panel of fabric treated to make the fabric repel stains, repel and release stains, or absorb and then release stains covers the crotch area and may extend up the front and/or back of the undergarment. Fabric on each side of the panel, also made of fabric treated to make the fabric repel stains, repel and release stains, or absorb and then release stains, provides additional protection to prevent leakage. In addition, in the preferred embodiment, the undergarment will have antimicrobial properties.