Prologo dimension tri cpc nack saddlethis superb seat is ideal for triathlon and time trial use as it delivers incredible comfort and control wherever your journey leads you. It features a hard wearing microfibre cover which makes it excellent at handling multiple changes in your riding position when tackling all the challenges of long distance and time focused rides. Prologo has also set the benchmark by kitting it out with light foam padding with variable densities to increase your stability and comfort as you conquer every road with power.nack carbon rail road saddleprepared for race winning performance, this awesome version is equipped with a nack carbon rail construction. This makes it immensely stiff when climbing as well as lightweight, so you won't have to worry about any excess grams holding you back from a podium topping finish.pas channelcoming complete with an ergonomic v shape and pas channel combination, this brilliant seat guarantees better blood flow and eliminated numbness. This makes it an excellent choice of upgrade for time trail and triathlon riders as it relieves pressure in your perineal area, so you can ride longer and further than ever before. One final highlight is its cpc technology improves stability and aerodynamics as you soar past your competitors in style.features cover material microfibre rail material nack carbon padding light foam use road, triathlon, tt gender unisex dimensions 245x143mm rail dimensions 7x9.3mm weight 181g approxtechnologies cpc connect power control prologo patented technology. The specially designed cpc surface features a mat of hollow cones of various heights and diameters, arranged for maximum benefits to the rider. These include optimised grip, shock absorption and air cooling. It also enhances blood flow through a massaging action, reducing numbness and tendon related discomfort. The tests carried out on the track and in the wind tunnel with some of the most important professional teams in the world, confirmed an improvement in performance of 5 8% foams with variable density, increased by 15% in the upper part and on the tip of the saddle, allow to increase the support surface, dissipating the pressures homogeneously, as well as guaranteeing a greater support area for the antero ischial area, especially in the maximum aerodynamic position.buy prologo components from chain reaction cycles, the world's largest online bike store.