Convertible diaper/pant with ease of application

A pre-disposable reusable disposable undergarment absorbent article having two openings that are directly below and visible through a waist opening. The waist opening has a measure of relaxed waist opening or relaxed waist diameter that is greater than the width of the absorbent article frame in the crotch region. As such, the wearer's legs are positioned within and through the leg openings for easy application of the underlaid disposable resuscitable disposable absorbent article. After initial placement of the absorbent article, a waist size adjustment feature allows the waist circumference dimension to be adjusted to fit the waist opening to the wearer's waist.