I'm knitting these socks as faithfully as possible to the design by Rokugo Inotani. The entire sock is knitted with three strands of fingering weight wool yarn (100% wool) held together. For the toes, I've added a strand of superfine angora yarn, making it four strands held together. For the heel, I've added one strand of fingering weight yarn, also making it four strands held together. This is to make them durable and provide good cushioning. The color is closest to the overall image of ① and ④. I've knitted these carefully with good quality yarn, but it's a hobby project. I've decreased and increased stitches at the ankle to make it fit snugly. This is a hobby project, and it's not perfect. I hope those who understand this will consider purchasing them.