This pattern is called bipolar because of two reasons: first, it combines two yarns with different character. Shibui(tm)s Linen is a chainette yarn made from linen that gives some body to the fabric. Cima is a plied wool yarn that adds warmth. Second, the resulting item can be worn as a cowl or as a headband. Depending on how you arrange the fabric, it can look plain or like a turban.
This item is worked in Tunisian simple stitch only, but in two alternating colors. The fabric is double-layered so there is no right or wrong side. The piece is worked flat and then seamed. I am introducing Tunisian grafting which is a way to seam two rows of Tunisian crochet together in a nearly invisible fashion.
27 stitches and 28 rows = 4 inch in two-color Tunisian simple stitch