Consider the sweater. Perched on our shoulders are tens of thousands, who are we kidding, millions of stitches in a garment that could, depending on the yarn, weigh upwards of a kilo. The fabric is expected to move and flex and breathe with us, withstand the slings and arrows of everyday wear, and, at the end of the day, still look as fresh and beautiful as the day it was born. Not every yarn can do this.

For this column, I decided to use Amy Herzog’s Megunticook cardigan as our teaching tool. I’ve always been partial to trinity stitch. It formed the body of my favorite blankie when I was little, and it runs along the cuffs and trim of Herzog’s sweater. The rest of the garment is smooth, simple stockinette.