From Knitting New Scarves:

Of all the scarves in this book, Fringe is undoubtedly the easiest to knit. The only challenge a beginner might have is working with two strands of yarn held together and that’s simple to do. Instructions are given for both three-color and four-color variations, but you can easily adapt them to as many colors as you like. Making this scarf is a great way to use yarn leftover from other projects.

Two strands of yarn are held together in this pattern, making a super bulky gauge.