Vionic with Orthaheel Technology Women's Kerstin Mule Faux Leather^Synthetic Rubber sole Slip your feet into style and comfort with the charm of these Vionic&#174; with Orthaheel&#174; Technology mules. Innovative, podiatrist-designed Orthaheel Technology provides superior orthotic support, relief, and stability to help realign the feet to their natural position. Research supports Orthaheel Technology's success in reducing over-pronation, which can help relieve associated common aches and pains, such as heel pain (plantar fasciitis), knee pain, and lower back pain. Received APMA Seal of Acceptance. Click here to view Seal. Synthetic leather upper with braided detailing across the front. Hook-and-loop closure allows for a secure fit with plenty of adjustability. Textile lining keeps feet cool and dry. Microfiber footbed will cradle the foot in comfort and support. Features the Orthaheel premium "Active" removable biomechanical footbed. Flexible and lightweight rubber outsole with patterned tread. Imported.