One of the easiest reconstructions is to remove a turtleneck. Since I have put on a little weight, I find turtlenecks a little hot. Plus they make my shoulders look very wide and because of this make me look heavy. On this sweater, I just cut off the turtleneck and turned the edge. Then I hand sewed around it using a straight stitch. I used turquoise embroidery floss with all the strands. Because the sweater has little knubs of multi colored fiber in it it really blends in. I used several short pieces of embroidery floss instead of one really long one so that the seam has a little give. When using a knit fabric, if it has no give it may pop. Many knits require no edge finish so this really is a quick reconstruction.