Orthaheel Vionic Technology Womens Coro Slide Sandal Black Size 11 Leather Rubber sole Subtle patent piping lines two straps across the vamp to give this adjustable backstrap sandal a luxurious look and feel. Podiatrist-designed- biomechanical orthotic footbed with deep heel cup helps support and realign the feet back to their natural position. Lightweight- flexible EVA midsole absorbs shock to reduce pressure on the feet- ankles and knees. Durable rubber outsole with a patterned tread provides traction on a variety of surfaces. Clinically shown to help relieve common causes of plantar fasciitis- heel pain and knee pain- related to over pronation and flat feet. Has the American Podiatry Association Seal of Acceptance.