Prologo nago evo x10 t20 saddleprologo nago evo x10 saddle with t20 rails is the perfect cross county saddle with side protection systems slide control technology and light weight rails shape semi round end use marathon learn more with the prologo buying guide featuressize 280x135mmweight 220gbase carbonfiberrail t2 0cover microfiberpadding ev2 active densityactive density multiple padding zones along the saddle high density at the rear medium in the middle and low at the fro