Excellent used condition, make me an offer! Of-the-moment Mary Jane. The Fern combines everything you love about Mary Janes with everything you adore about Vionic support and style Of-the-moment Mary Jane. The Fern combines everything you love about Mary Janes with everything you adore about Vionic support and style. One look at the elasticized vamp strap covered with rhinestones and the fun print of the soft jersey lining and you'll know you've met your new Mary Jane