The studio’s knitting machine is used for making samples. For intricate cold-weather pieces like the vest in the previous slide, or their super-chunky sweaters, the sisters will often do the complicated multi-strand knitting in-house, because of the artistry involved. Any back panels of plain knit will be made on the machine first and then outsourced for production to one of the professional knitters they work with. Their loose-weave warm-weather knits, which they often cut up and then sew back together, or patch together out of different colored panels, can be made with the machine as well.