The invention relates to a shoe for providing enhanced comfort and protection to a user's foot having a sole with a top surface, an upper placed above the top surface, an optional arch made of a single unit of malleable material and placed between the top surface and upper, and an optional metatarsal...http://www.google.co.uk/patents/US7475500?utm_source=gb-gplus-sharePatent US7475500 - Shoe with improved construction
