Vionic with Orthaheel Technology Women's Fiji Ivory Synthetic Size 5 Medium Synthetic Built-in podiatrist-designed and tested orthotic arch support. Restores the foot's natural / neutral alignment which enables the feet- ankles- and legs to function dynamically as they were intended. Orthaheel Fiji is a Medium Width - B sandal. Tri-planar Motion Control system for essential support and stability. Flexible and lightweight construction. Great for people who have plantar fasciitis or over-pronation. Research supports Orthaheels success in reducing over-pronation- which can help relieve associated conditions such as heel and ankle pain.