Vionic with Orthaheel Technology Women's Walker, Blue, 8.5 W Leather Imported Synthetic sole Leather Upper Removable Textile-covered EVA Footbed. Built in .5" elevation for a smooth transition in heel-to-toe strike zone. Durable Rubber Outsole APMA Seal of Acceptance Vionic active footwear features Active Motion System (AMS) technology, combining our podiatrist-designed orthotic with a flexible, cushioned outsole and a lightweight, breathable upper. Step into support for work, play and everyday.