Abstract: A method of forming a combination garment having a crotch area therein from a crotch piece and two tubular blank members each having a leg portion and an upper portion terminating in an open end and a run guard portion disposed between the leg portion and the upper portion, comprising the steps of longitudinally slitting the blank members between the open ends thereof and points in the run guard portions thereof to provide free edges, seaming the free edges between first aligned points adjacent to the open ends and a first predetermined point adjacent to the crotch area to provide a first seam, seaming the free edges between second aligned points opposite the first aligned points and adjacent to the open ends and a second predetermined point adjacent to the crotch area to provide a second seam, the first and second predetermined points at the inner ends of the first of second seams being spaced apart to provide an opening to receive the crotch piece, aligning one of the edges of the crotch piece with one of t