An apparatus for treating a wound with negative pressure wound therapy, comprising: a stabilizing structure for insertion into a wound comprising: a length corresponding to a y-direction and extending along a central longitudinal axis of the stabilizing structure between a first end and a second end of the stabilizing structure; a width corresponding to an x-direction, the width being transverse to the length and extending along a central transverse axis of the stabilizing structure between a first side and a second side of the stabilizing structure; and a height corresponding to a z-direction, the height being transverse to the length and the width and extending between a top surface and a bottom surface of the stabilizing structure; wherein the length and width are each greater than the height; wherein the stabilizing structure comprises a plurality of cells defined by one or more walls, the cells being provided side-by-side in a horizontal plane parallel to the x-direction and the y-direction, wherein each of the cells has a top end and a bottom end with an opening extending through the top and bottom ends in the z-direction; wherein the plurality of cells are provided in a plurality of rows extending width-wise across the stabilizing structure, wherein cells of adjacent rows are staggered relative to each other; and wherein the stabilizing structure is configured such that upon application of negative pressure to the wound when the stabilizing structure is inserted into the wound, the stabilizing structure collapses more in the horizontal plane than in the z-direction, and the stabilizing structure collapses more in the x-direction than in the y-direction; characterized in that at least one of the cells has a concave-hexagon shape comprising two parallel sides and two internal angles greater than 180 degrees. a stabilizing structure for insertion into a wound comprising: a length corresponding to a y-direction and extending along a central longitudinal axis of the stabilizing structure between a first end and a second end of the stabilizing structure; a width corresponding to an x-direction, the width being transverse to the length and extending along a central transverse axis of the stabilizing structure between a first side and a second side of the stabilizing structure; and a height corresponding to a z-direction, the height being transverse to the length and the width and extending between a top surface and a bottom surface of the stabilizing structure; wherein the length and width are each greater than the height; a length corresponding to a y-direction and extending along a central longitudinal axis of the stabilizing structure between a first end and a second end of the stabilizing structure; a width corresponding to an x-direction, the width being transverse to the length and extending along a central transverse axis of the stabilizing structure between a first side and a second side of the stabilizing structure; and a height corresponding to a z-direction, the height being transverse to the length and the width and extending between a top surface and a bottom surface of the stabilizing structure; wherein the length and width are each greater than the height; wherein the stabilizing structure comprises a plurality of cells defined by one or more walls, the cells being provided side-by-side in a horizontal plane parallel to the x-direction and the y-direction, wherein each of the cells has a top end and a bottom end with an opening extending through the top and bottom ends in the z-direction; wherein the plurality of cells are provided in a plurality of rows extending width-wise across the stabilizing structure, wherein cells of adjacent rows are staggered relative to each other; and wherein the stabilizing structure is configured such that upon application of negative pressure to the wound when the stabilizing structure is inserted into the wound, the stabilizing structure collapses more in the horizontal plane than in the z-direction, and the stabilizing structure collapses more in the x-direction than in the y-direction; characterized in that at least one of the cells has a concave-hexagon shape comprising two parallel sides and two internal angles greater than 180 degrees.