The castelli cross prerace jacket is designed to quickly get you up to race temperature with primaloft 60 insulation to the front the padded jacket will keep most of your body heat inside the jacket while the nano flex back enables heat to escape and repels water made from stretchy fabric for full freedom of movement the jacket will keep you protected from the rain wind snow and mud ad key features primaloft 60 insulation on front and sleeves with toray 30g water repellent oute