An expandable and retrievable stent comprising: an inner strut with an inner strut proximal end portion and an inner strut distal end portion; a distal anchor securable to the inner strut distal end portion; a first traveling anchor movably attached to the inner strut, proximal to the distal anchor; and a movable member connected to the distal anchor and the first traveling anchor; wherein the movable member has a radially compressed configuration when the traveling anchor is in a first position and a radially expanded configuration when the traveling anchor is in a second position; characterised in that the movable member includes a plurality of proximal arms connected to the traveling anchor, a plurality of distal arms connected to the second anchor, and a plurality of outer struts, each outer strut being connected to one proximal arm and one distal arm; the struts having three configurations, namely: a first compressed state, wherein the distal arms are pivoted distally away from the distal anchor, the proximal arms are pivoted distally away from the first traveling anchor and the first traveling anchor is in a first position; an expanded state, wherein the distal arms and the proximal arms are substantially perpendicular to the inner strut and the first traveling anchor is in a second position; and a second compressed state, wherein the distal arms are pivoted proximally away from the distal anchor, the proximal arms are pivoted proximally away from the first traveling anchor and the first traveling anchor is in a third position; wherein the second position is between the first position and the third position. an inner strut with an inner strut proximal end portion and an inner strut distal end portion; a distal anchor securable to the inner strut distal end portion; a first traveling anchor movably attached to the inner strut, proximal to the distal anchor; and a movable member connected to the distal anchor and the first traveling anchor; wherein the movable member has a radially compressed configuration when the traveling anchor is in a first position and a radially expanded configuration when the traveling anchor is in a second position; characterised in that the movable member includes a plurality of proximal arms connected to the traveling anchor, a plurality of distal arms connected to the second anchor, and a plurality of outer struts, each outer strut being connected to one proximal arm and one distal arm; the struts having three configurations, namely: a first compressed state, wherein the distal arms are pivoted distally away from the distal anchor, the proximal arms are pivoted distally away from the first traveling anchor and the first traveling anchor is in a first position; an expanded state, wherein the distal arms and the proximal arms are substantially perpendicular to the inner strut and the first traveling anchor is in a second position; and a second compressed state, wherein the distal arms are pivoted proximally away from the distal anchor, the proximal arms are pivoted proximally away from the first traveling anchor and the first traveling anchor is in a third position; a first compressed state, wherein the distal arms are pivoted distally away from the distal anchor, the proximal arms are pivoted distally away from the first traveling anchor and the first traveling anchor is in a first position; an expanded state, wherein the distal arms and the proximal arms are substantially perpendicular to the inner strut and the first traveling anchor is in a second position; and a second compressed state, wherein the distal arms are pivoted proximally away from the distal anchor, the proximal arms are pivoted proximally away from the first traveling anchor and the first traveling anchor is in a third position; wherein the second position is between the first position and the third position.