A: A herringbone weave is a variation of a twill weave that results in a broken zigzag pattern. It is made up of short parallel rows, slanted in one direction and then another, forming a distinctive "V"-shaped design. A herringbone weave is often made more prominent by using two colors - one in the weft and another in the warp. The slope or degree of the angle of the diagonal rows can be altered by varying the number, tightness or size of yarns. Because it resembles the skeleton of a herring fish, this woven pattern came to be known as herringbone.
Although similar, a herringbone pattern differs from that of a chevron. To achieve either one, a twill weave is required. However, a chevron is a true zigzag with the direction reversing at the exact point of the change, while a herringbone has a break, and actually jumps one or more places, when the direction changes.
Below is an image of a herringbone weave: