The Vasyli McPoil Orthotic is based in a dual-density construction designed to allow for normal for pronation but to prevent over pronation. Ideal for conditions of hypermobility or Achilles stress resulting from traumatic lateral ankle sprain (sports injuries), the Vasyli McPoil provides relief and enhances recovery. Tom McPoil has utilized this construction during decades of practice, treating a wide range of lower-limb biomechanical disorders in both athletes and non athletes. Vasyli's expertise in orthotics design and manufacture enabled Tom's successful in-house product to become available to practitioners around the world. Rearfoot correction: 6 degrees. High friction co-efficient top cloth. Unisex. Heat Moldable. Comes as a pair and are size large.