Just undo the cord at the top and you will have a neckwarmer!

Required: 100g of 12 ply yarn. It can be made up of any double knitting yarn (8 ply) and any 4 ply yarn - the 2 strands are used together so you will be knitting with 12 ply. You can use any combination of weights so long as they add up to 12 ply.
Needles: Metric 6mm circular
Tension: 4 stitches = 1 inch
Abbreviations: instructions written in full
To fit: 22 inch head