Selle Italia SLR 3D Carbon Saddle. Features: The proprietary printing pattern and Carbon DLS technology of the SLR 3D Carbon helps make it the lightest 3D printed saddle available The differentiated cushioning zones give progressive absorption and the carbon rails provide strength and ensure comfort on every pedal stroke L3: "Wide" intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles) S3: "Narrow" intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles) Specs: Model:SLR 3D Carbon Idmatch:L3 Rails:Carbon Top:3D Printed Color:Black Lx W Mm:242x145 Weight:143g