The present invention relates to a disposable absorbent article comprising a chassis defining a front waist region, a back waist region, and a crotch region disposed between the front waist region and back waist region. The article includes a fastening system that includes one or more fastening devices, each having at least one tab member configured to releasably connect to a slot member when, for instance, fastening the article to the body of the wearer. A variable stiffness member is associated with at least a portion of the fastening device that, in response to a predetermined external stimulus, reduces its stiffness to correspondingly reduce the stiffness of the fastening device.