An absorbent article can utilize a chassis design comprising a unitary inner layer and an expandable absorbent assembly attached to the inner layer, with the inner layer including elasticized portions so that the absorbent article conforms to the body of a person wearing the article. The expandable absorbent assembly can be minimally attached to the garment side of the inner layer and, in some embodiments at an aperture or opening in the inner layer that allows exudates to pass into the absorbent assembly. The article can further comprise an extensible outer layer attached to the garment side of the inner layer so that the outer layer covers the absorbent assembly and elastics, with the outer layer attached at the perimeter of at least portions of the article.