The designer of the Hedera Helix Socks, James Arnall-Culliford, writes: “Afterthought heels struck me as brilliantly clever the first time I came across them. There are so many options at a knitter’s disposal in terms of how you do the decreases, the yarn you use and so on. Furthermore, as someone who is hard on his socks, I love that, if you’re careful, the heels can be replaced.”
See the video tutorial for this very clever technique here. This is a game changer for making socks more easily.