Featuring steel rails and an advanced silhouette for the ultimate SLR sitting shape- Builds upon the renowned SLR shape with innovative material selections, making it a top choice for competitive racing and group ride- Crafted with PU padding for comfort and performance, and a micro-perforated cover for a sleek appearance, the Elite is equipped with durable steel rails that enhance road feedback absorption, reliability, and lightweight design- L3 and L1: "Wide" intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles)- S3 and S1: "Narrow" intertrochanteric distance and high pelvic rotation (Flow and SuperFlow saddles)