A sanitary napkin adapted to be worn in a thong undergarment has been patented. The undergarment has a body faceable surface and a garment faceable surface. The sanitary napkin comprises a central absorbent pad, which has a liquid pervious cover layer, a liquid impervious barrier layer and an absorbent core between the cover layer and barrier layer. The sanitary napkin has a longitudinal centerline, a lateral centerline, a pair of opposite longitudinal side edges, a first distal end with a relatively narrow width and adapted to be worn in a posterior portion of the thong undergarment in use and an opposite second distal end with a relatively wider width that is adapted to be worn in an anterior portion of the thong undergarment in use. It also includes a pair of flaps extending laterally outward from each longitudinal side edge along a respective line of juncture. A first flap is substantially adjacent the lateral centerline and is adapted to fold over a crotch portion of the thong undergarment in use along a first preferential bending axis and to contact the garment faceable surface of the thong undergarment. A second flap is intermediate the first flap and the first distal end. The second flap is adapted to fold over the posterior portion of the thong undergarment in use along a second preferential bending axis and to contact the garment faceable surface of the thong undergarment. The first flap is separated from the second flap by a flange portion. The flange portion has a lateral dimension that is insufficient to allow the flange portion to be folded over an edge of the thong undergarment or to contact the garment faceable surface in use. The first preferential bending axis is substantially collinear with the second preferential bending axis within the flange portion. The first preferential bending axis is parallel to the second preferential bending axis.