The Power Comp saddle features a stiff carbon-reinforced shell and a Body Geometry design that caters to all riders. Where it differs however is a matter of rails‰ÛÓCr-Mo rails to be exact. This means that you sacrifice some weight savings but otherwise you receive the same superior performance in all seating positions‰ÛÓespecially aggressive ones. Proven through blood flow testing and pressure mapping and featuring our medium-grade Level 2 PU padding the extra wide and elongated Body Geometry channel and proper sit bone support provides all-day comfort. Specialized Power Comp Bicycle Saddle in Black