A method of making a prefastened refastenable diaper or other undergarment includes the steps of forming a web of diaper material, cutting holes in the center of the web as precursor leg cutouts and, placing a fastening system divided between front and back waist sections onto each diaper section of the web to prepare inchoate diapers having their long axes in the cross machine direction of the web. Then the web is cut to define the web into individual diapers. The diapers are then folded in half at the crotch section, placing the fastening system section in lapping alignment and fastening the system together. The diapers are then removed by the leg holes to bundle and place the diapers in point of sale containers. The method lends itself to simple in-line process machinery for accomplishing the manufacture of the diapers. The method creates diapers which are useful upon removal from the point of sale container as pull on training pants and which may be easily removed in the fashion of a diaper by separating the fasteners.