Vionic with Orthaheel Tech Women's Anna Toe Post Sandals Woven / Polyurethane The built-in podiatrist-designed and tested orthotic arch support in the Orthaheel Anna restores the foot's natural / neutral alignment which enables the feet- ankles- and legs to function dynamically as they were intended. Orthaheel Anna is a Medium Width - B sandal. Tri-planar Motion Control system for essential support and stability. Flexible and lightweight construction. The microfiber covered footbed on the Orthaheel Anna adds style and comfort. 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.