This Prologo Zero II T-Irox CPC Saddle is a lightweight flat saddle designed for the road, XC or mountain biking racers. With T-Irox rails which gives a great balance between weight and strength. They are a light steel alloy which is used in aviation and aerospace industry and is highly resistant to traction and torsion for its weight. On top of the rails is a light and strong carbon injected base with Light PU padding which microfibre cover, which have tiny suction cups on the top. These are part of Connect Power Control which holds you to the saddle. This is technology that has been used on gloves for F1 and Moto GP, so is proven to be grippy. which makes the Zero II the perfect saddle for finishing off your racing bike without losing out on comfort.