Elmhurst by Kenneth Cole Reaction – Slip-On Mule with Studded Upper Meet your new statement flat: the Elmhurst Slip-On Mule. Equal parts edgy and effortless, this modern silhouette brings instant attitude to any look with its studded upper and clean, backless design. Slip into something bolder—whether you're dressing up denim or adding a spark to tailored pieces, Elmhurst does it all with downtown polish.