Abstract: A method of manufacturing an interior trim panel disposable proximate vehicular sheet metal includes the steps of forming a multi-layer headliner by providing a substrate that includes a front surface, a back surface opposite the front surface, and a substrate thickness bound by the front and back surfaces; forming at least one slit that completely extends through the substrate, wherein the at least one slit defines at least one first opening in the substrate, and at least one second opening in the substrate, wherein the at least one first opening is formed in the front surface, wherein the at least one second opening is formed in the back surface; and concealing the at least one first opening by providing a covering adjacent the front surface.

Abstract: A headliner comprising a substrate having a weakened area, the weakened area defined by at least one slit that completely penetrates through the substrate; and a decorative cover adhered to the substrate. A method of manufacturing a headliner with a weakened area, comprising the steps of forming a substrate, weakening the substrate by forming at least one slit that completely penetrates through the substrate, and concealing the substrate with a decorative covering.