An absorbent article comprises a chassis comprising a topsheet, a backsheet, and an absorbent core disposed between the topsheet and the backsheet, the chassis having a body-facing surface and an outer-facing surface. The article also comprises a pair of side flaps comprising a first surface, a second surface opposite the first surface, and a first adhesive. The side flaps have a proximal end and a free distal end wherein each distal end is foldable around an edge of an undergarment when applied on the undergarment during use to attach the first adhesive to the underside of the undergarment thereby attaching the absorbent article to the undergarment. Each of the side flaps is formed discretely to the chassis and is bonded at the proximal end by the first surface to the body facing surface of the chassis at a joint, and each side flap extends inwards from the joint in a lateral direction of the absorbent article with the first surface facing the top sheet of the absorbent article and each side flap is extensible. A process for preparing the absorbent article is also described.