The sweater is worked seamlessly in rounds in one piece from the top-down. After the collar is worked, the colorwork-yoke is shaped by increases for body and sleeves and additional radial increases up to the sleeve separation. The sleeve stitches are then placed on hold, underarm stitches are cast on, and you continue to work the body with some side-pleats at chest height onwards to the bottom ribbing. After the body is completed with color blocks, sleeve stitches are placed back on the needles to be worked top-down in the round.