This scarf is knitted entirely in plain knit (garter) stitch. The twists and turns are produced by working short rows.
This pattern is suitable for any DK or aran/worsted weight yarn which has long colour (or texture) changes, paired with a suitable needle size. Other suitable yarns would be Noro Kureyon or Silk Garden, Crystal Palace Taos or Rico Poems.
A diagram of the pattern of short-rows is given as well as written instructions.