Ergon SR Allroad Core Saddle Superlight and Comfortable The saddle you use on your bike plays a significant role in your performance and comfort. With the right saddle, you'll have more fun riding. The Ergon SR Allroad Core Saddle delivers sporty performance able to take on asphalt as easily as a hard-packed dirt road. It has Core HD technology with its ergonomic core that dampens road shock and vibrations, alleviates numbness in the perineal area, and reduces seat pressure. Features Friction-reducing side flanks for smoother pedaling Core HD technology that reduces vibrations, pressure, and numbness Nylon composite shell with Cro Mo rails Small/Medium fits sit bone width of 9-12cm Medium/Large fits sit bone width of 12-16cm Max rider weight: 265 lbs SPECIFICATIONSDimensions (Lx W)N/ACover Microfiber Cover Shell Nylon Composite Padding Orthopedic Air Cell Foam Rails Cro Mo Rails, Round Intended Use Road, Gravel (No MTB Use)Weight N/A | Ergon | Sr Allroad Core Saddle | Black/gray | Medium/large | Nylon