The present invention relates to a shoe including a sole as well as an upper that rises up from the sole, the upper including at least two portions that are at least partially mutually displaceable with respect to each other, thereby adjusting the housing size or volume (RZ) for a foot in the shoe, as well as tightening-release means of the mutually displaceable portions, the shoe also including control means of the tightening-release means operable or arranged at the back or at the heel of the shoe.