These started out to be the April SOM from Chameleon Color Works . The official pattern was for the length wise sock, which was split for the heel which is how you get a different color sole. the heel is knit in as an after thought. It is pick up and knit around for both the top and the ribbing with picot bind off. I like it, it is comfortable, except for the heel. So I decided to be fraternal with the second sock. It was knit in the round from the top down. After the heel, the foot was knit in the round (except for the back and forth on every red row to maintain the color separation.) Think of intarsia in the round. Yarn was bamboo merino in the reds, and merino tencil in moss for the contrast. On little fiddly needles.