Broken Rib Infinity Cowl Pattern
You will need: 
2 skeins of extra bulky yarn
15mm circular needles

Using long tail cast on method, cast on 70 stitches onto your circular needles.  Normally you would ensure the yarn is not twisted when joining... (If you want a loop cowl not an infinity cowl this is what you would do).  Join with a single twist in the yarn (take the end of the joining side, the side with no yarn ends, and turn it up and over the needle one time).  Place marker, knit all the way around.  Second round, Knit one, Purl one the entire way around.  Row 3 knit all the way around, Row 4 Knit one, purl one all the way around. etc... Just repeat row one and row two until you've used up almost 2 balls of yarn or until it's the desired width (This one, for reference, is 14 inches wide).  Bind off and weave in ends.  Taa-daa!!!