Our original revolutionary shape and thickness Long Shims (formerly called Center Shims), tapered on both ends with thicker section in the middle, designed to aid recovery and rebuilding of back muscles. Can be creatively used as a corrective tool in many ways including overlap blending with other shims. Engineered with the perfect balance of “support” and “squish,” creating clearance and/or contouring as needed for customized fit. Fabulous help for a less-than-ideal saddle or to enhance your good saddle’s function.