Yarn:

You will need 2 x 50g balls of each colour.

From the pattern description:

This neck wrap is knitted in two coloured halves so the contrasting colours appear when it is wrapped around your neck.

The scarf is knitted in alternating bands of stocking stitch and reverse stocking stitch, which form undulating bands. Reverse stocking stitch is created by adding an extra knit row after the 5th row to reverse the pattern formation. It forms stripes of pattern with no right or wrong side when you look at the scarf.