HOW TO INTERFACE A HEM. This is a really clever way to add weight to a hem so it falls nicely AND have no stitches show on the right side. Serge & press hem. Stitch two layers of fusible interfacing, length & width of hem, right sides together along one long edge. Place in the hem with open side 1/4" from fold & fuse. Hem stays together with no stitching showing on the right side of the garment. Very tricky!!