It's a half scarf, half hood...a snood!
I want one so badly and I have found a couple while out and about in Paris but none have been the one for me. Basically, it's a never ending scarf but some come with an extra large space for your head and they are the cutest.
These versions have kind of got the idea, but I'm looking for something bigger & better...something really knitted & chunky. I'll let you know when I find it!
Echo Double Infinity Scarf ($48)