Innovative 4130 chromoly rails support a reinforced laminate layer that maintains the integrity of the full grain leather top. The specific shape of our patented slot's inverted rear wings allows the saddle to move with you. We call it Flex-Fly. It reduces perineal pressure, sit bone pain, and saddle sores. This saddle has no break in period. It feels good from day one. T Series is available in WaterShed leather and TruLeather. This is the saddle for low mileage riders (less than 100 mi/week) or those below 160 pounds.