An anatomically form-fitting generally self-adjusting disposable absorbent garment and methods of integrating and using the garment. The garment comprises a breathable elastomeric nonwoven fabric outer cover resiliently stretchable in cross-body direction, including a pair of leg openings, front and rear waist sections fastenable with one another defining a waist opening, a crotch section situated between the leg openings and opposing front and rear panels separated by the crotch section. An absorbent insert structure is substantially superposable on the front and rear panels and the crotch section, including a liquid impermeable barrier, a liquid permeable body side liner and an absorbent composite disposed therebetween. The absorbent insert has opposed longitudinal ends which are attached to the outer cover by bonds or snaps at selected waist attachment zones, defining one or more free-span zones of the outer cover underlying the insert and having substantially unrestricted functional stretchability therein. The insert may also be attached along the leg openings.