The classic platform get a modern update with built in arch support. The Vionic Rio is casual women's platform slide sandal with three adjustable straps and woven patterned upper. These Vionic Rio Cream Woven Synthetic Women's Sandals have the following features: Upper: Textured Faux Leather Three adjustable straps across the vamp Metal buckle detail Molded EVA footbed Dual-density midsole for optimal comfort Durable rubber outsole Heel height: 1.46 Innovative podiatrist-designed Technology provides superior orthotic support, relief and stability which helps realign the feet back to their natural position Research supports Vionic's Technology 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