Selle Italia SLR Boost Kit Carbonio Superflow Saddle - Large. The most iconic saddle of Selle Italia the SLR which for years has been the reference point in terms of style performance comfort and lightness and which has supported great champions. Thanks to the highest quality technology and materials such as carbon the SLR Boost is unsurpassed for its lightness from any other short-fit saddle available. A refined aesthetic which combines with unparalleled comfort thanks to its compact structure the slight rise on the back and the micro-perforated cover that help to easily find and maintain the ideal sitting position ensuring proper support of the ischial bones and preventing any problems from crushing.