These are not a shoes. According to the Oxford English Dictionary, the definition of a shoe is: /An outer covering for the human foot typically having a thick or stiff sole with an attached heel and an upper part of lighter material./ Clearly, Vivobarefoot is not in the “shoe” business. VIVO’s let your feet move like feet. No additional extras; just an ultra-thin sole that gives you maximum sensory feedback and doesn’t restrict your foot’s natural movement.