A compression element (80) for a
mooring component comprises a plurality of shell pieces (42b, 42b'). Each shell piece has a first annular portion and a second annular portion and a middle portion extending between the first annular portion and the second annular portion. The first annular portion and the second annular portion lie in a plane perpendicular to a central axis of the compression element. The
maximum dimension of the first annular portion in a direction perpendicular to the central axis is greater than the corresponding
maximum dimension of the second annular portion. The shell pieces are arranged along the central axis such that the first annular portion or the second annular portion of one shell piece is joined to the first annular portion or the second annular portion of an adjacent shell piece. The compression element is arranged such that, when a compressive stress causes the compression element to be compressed, the middle portion of one shell piece contacts the middle portion of an adjacent shell piece.