It features a tough microtex cover construction which makes it absolutely ideal at handling the increased movement & pressure that comes with longer journeys. Fizik has also equipped this sleek version with an alloy rail construction which provides a firm hold to your seatpost, so you can ride confidently from the smooth city streets to the rocky gravel roads of the countryside. Central Relief Channel Ready for action, this fantastic model is also kitted out with a carbon-reinforced nylon shell construction. This makes it light & supportive while its central cut-out removes any pressure from around your perineum area. As a result, you'll enjoy the freedom to ride for much longer than before without worrying about suffering from numbness or fatigue.