Marble because that's the brand name, and that makes it easy to differentiate from the other beanies, especially since the just-plain-Beanie that I made for my husband is made out of the same yarn, though I did that one one-over-one. (Beanies are so easy to make! :D) It's a very soft yarn (100% acrylic, I think) and I'm doing two-over-two on my Knifty Knitter:
And a few several hours later:
I've got less than twenty rows to go so I should have a finished-project post soon!