The preformed configuration is constrictable to an elongated, low profile configuration, as shown in FIGS. 1B, C and D, as well as compressible to an expanded, high profile configuration, as in FIG. 1F. The elongated, low profile configuration is formed when a device, such as a sheath or a tube, is translated along guide wire strand 12 and over wire strands 23 in a distal direction.