I like the moebius concept, I think it is cool that it is an infinity loop. I also think they look very classy. The pattern I started with was a free download from p/hop. The pattern is super simple, starts with a FSC Foundation SINGLE Crochet. If you are not familiar with FSC then Future Girl Craft Blog has an excellent tutorial, with videos, to get you started.
I made the first one a little wonky cause I did not understand that I really needed to go around the top and the bottom with each row, it said so in the instruction, I just did not understand it the first time.
After the first one I also realized that I can use any stitch I want after the FSC and get different looks each time. I am having a blast making the cowls, and they are fun to wear.
Start with fewer stitches than the pattern calls for and get a neck warmer, more, a cowl that can be pulled over your head like a hat, even more and you have a shawl. Of course the weight of the yarn and the hook you use affects the circumference of the cowl too. Have fun and keep your ears warm.