Lightweight performance- Made with a carbon lay-up method to create thinner yet stiff rails- The handmade padding is applied only where you need it, helping to keep you comfortable- Available with or without a Superflow cutout- 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)