Designed with our Retül fit specialists doctors and engineers the Sitero Plus is the best-fitting saddle for aerodynamic time trial positions. A wide channel progressive shape level 3 padding and multiple width options provide optimal comfort and support for long distance rides in an aerodynamic position. And to further ensure that this is the best Triathlon/Time Trial saddle on the market it features hollow Chromoly rails and SWAT™ mounts allow for aerodynamic storage of your ride essentials.