The platform gets an upgrade with the Rio. With three adjustable straps across the vamp and metal buckle detail the Rio brings both function and style to a classic silhouette. Vionic's innovative podiatrist-designed FMT Technology provides superior orthotic support, relief and stability which helps realign the feet back to their natural position. Research supports FMT 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. Vionic Rio