The afterthought heel is a good replacement for the gusset heel in socks. You add this afterthought heel after you completed the socks from the body to the toes. The afterthought heel is also easy to replace when it wears off. You can also add this as part of the socks design. These are the steps to do this. At the end of the leg of the socks, get a waste yarn similar to the weight of your socks yarn. Then, knit it half the number of the stitches Slip the stitches back to your left needle but do not twist. Again, knit the stitches in your working yarn until you reach the toe part. When you finish the toe part, recover the stitches that you will use for the heel. Take out the waste yarn, and put the live stitches on your two double-pointed needles. The heel opening should have the same number of stitches as the body of the socks. Arrange the stitches on your four knitting needles Put markers on the side of each edge of the heel opening. This marks your decreasing point. Then, decrease the heel as you do in the basic round toe. Finish the decrease when you only have 2 inches of stitches remaining. Connect them using the Kitchener Stitch. You have completed your afterthought heel. Now, your socks look extra chic.