Rosso Corsa Bib Knicker. That Must Be Special. We’ve put all our best technologies into this exceptional Knicker. Progetto X2 seat pad, Giro++ straps, and a mix of fabrics, including our Thermoflex Core Due. By applying the technical advancement of hollow-core fibers, we’ve made these Knicks not only lighter than your normal winter weight knicks but also warmer—and they keep you drier. Now you’re ready to put in those long base rides all winter long.