This document describes the design process of the CFRP monocoque of the SC19, the Formula Student vehicle completely designed by Squadra Corse Polito in season 2018/2019. With both static and dynamics events, FSAE competitions truly test the limits of student imagination and innovation, practical engineering and businesses analysis, and to some extent driving skills also. To make the design of the whole vehicle even more complex are the numerous constraints imposed by the regulation of the competitions. Among the most critical keys to success in the Formula Student competition include the ability to reduce vehicle weight: it will be explained what solutions and technical choices have been made in order to made saving weight with respect the previous vehicle, reaching a monocoque’s weight less than 20 kilos.