High strength and flexible carbon-iron steel FeC alloy rails or titanium Ti316 options- The rail is fixed in the rearmost part of the saddle, thus freeing the part of the body on which the ischial bones and perineal areas press, in turn limiting the pressure exerted by these zones on the saddle- Absorption system between the shell and the rail that highly reduces road shocks and vibrations- Special polyurethane cover guarantees high levels of comfort- The SuperFlow technology drastically reduces all physical limitations caused by prolonged pressure in the perineal area- L3: "Wide" intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles)- S3: "Narrow" intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles)