I used Amy Butler's August Fields Home Decor fabric. (Kay suggests using this weight of fabric and I can't imagine making it out of anything else. She also suggests wool or a vinyl coated cotton.)
I wanted a fabric that would really stand out since I will wear this coat in my booth as we travel next year. That's how I noticed it in the first place. Kay was wearing hers in her booth at Market and I instantly gravitated toward it!!
I know, right? HOT! Look out, Paris. You have some serious competition in the pose department!