They are a popular style of mule characterized by a clear vinyl strap and a distinct crystal-embellished trim along the edge of the sole. Key Features Upper: Transparent vinyl (PVC) for a "barely there" look Design: Square-toe silhouette with a slip-on mule entry Embellishment: Sparkling rhinestone or stud accents along the perimeter Heel: Typically features a sturdy block heel for added stability.