An improved, anti-irritant, disposable diaper. The diaper is comprised of a front portion, a crotch area, a rear portion, closing tabs for securing the diaper upon a wearer, waste containment means for collecting and isolating body wastes; attachment means for detachably attaching said containment means to the crotch area of the interior said diaper. The improvement comprises a reinforced, semi-rigid ribbing disposed contiguous to at least one surface of the containment means, for restoring the containment means to its original shape after being compressively deformed, and closure means provided on the containment means, to ensure closure of the containment means when the wearer is seated.