From Vionic®, the Karina sandals feature: snake-patterned leather upper with metal ring innovative podiatrist-designed Orthaheel® Technology that provides superior orthotic support, relief and stability that helps realign the feet back to their natural positions research-supported 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 slide-on thong construction with adjustable buckled strap EVA footbed durable rubber outsole Imported.