Selle Italia SLR 3D Elite Saddle. Features: Crafted with lightweight tubular steel rails 3D printed bike seat lattice structure for unmatched comfort and efficiency Meticulously designed with a proprietary 3D printed bike seat pattern and Carbon DLS technology Performance and reliability, thanks to the differentiated cushioning zones and lightweight steel rails that ensure a smooth and secure ride 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 Elite Idmatch:L3 Rails:Steel Top:3D Printed Color:Black Lx W Mm:248x145 Weight:178g