This Prologo Nago Evo Nack CPC Saddle is a lightweight semi-round saddle perfect for middle and long distance road riding and racing. The Nano carbon Nack rails which are a mixture of carbon fibre, Kevlar and aluminium filaments in the seatpost clamp area. Then the rails are treated to a production process called Braided Carbon Rail, the result is a balance structure and resistant to penetration. On top of the a carbon injected base has a 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. Prologo have used ESD (Ergo Shape Design), where they have trimmed the sides of the saddles making more space for the legs. This gives the rider a better, freer pedalling action and helps to stay in the right position. The Nago Evo Nack has Active Density padding will give you the final touches of comfort need to get through the day, high density at the rear, medium in the middle and low at the front.