From the Stitch Description: The interesting thing about this simple knit-purl fabric is that it looks exactly the same on both sides, even though the two sides are differently worked. It is not sufficiently elastic to be used as a true ribbing, but a beginner could use it as an attractive allover texture for sweaters, jackets, scarves, or baby blankets. It has no curl, and therefore serves well as a border pattern wherever the springiness of a true ribbing is undesirable, such as on button bands, pockets, and coat cuffs.

Location of Stitch: Page 4 from A Second Treasury of Knitting Patterns.