Disposable absorbent article with selectively expandable or inflatable components

A sanitary napkin comprising:

• a front edge, a rear edge, longitudinal edges, and longitudinal and lateral centerlines;
• a liquid impervious backsheet;
• a liquid pervious topsheet joined to the backsheet;
• an absorbent core intermediate the topsheet and the backsheet;
• an inflatable component having an inflatable chamber disposed intermediate the backsheet and the topsheet of the sanitary napkin, the inflatable chamber inflatable from a first thickness to a second thickness at least about 10 times the first thickness to bias a portion of the topsheet against a wearer;
• and
• means for inflating the inflatable component comprising a predetermined amount of a first material disposed on the sanitary napkin;
• and
• a predetermined amount of a second material disposed on the sanitary napkin, wherein the second material is separated from the first material by a breakable barrier, and wherein the first and second materials are combinable by breaking said barrier for providing inflation of the inflatable component;
• wherein the inflatable component further comprises a longitudinally extending portion substantially aligned with the longitudinal centerline of the sanitary napkin and a plurality of laterally extending portions extending intermediate the longitudinally extending portion and the sanitary napkin longitudinal edges;
• and wherein the longitudinally extending portion has an inflated thickness greater than an inflated thickness of the laterally extending portions.