A sandal with an elongated sole configured to the profile of a human footprint with a toe end and a heel end, employs a toe strap connected at two anchor points to grip the forward part of user's foot and a heel strap connected at two anchor points to grip the ankle of a user's foot with a lateral strap...http://www.google.es/patents/US4793075?utm_source=gb-gplus-sharePatente US4793075 - Sport sandal for active wear
