ASSOS 2/3 THERMOBOOSTER P1The new thermal textile is a highly elastic warp knit that wraps your bodys contours with an aerodynamic silhouette. Its also breathable enough for full gas efforts, and if the temperature or riding intensity get too high, the ThermoBooster P1 compacts to the size of a rain jacket to stow in a jersey pocket. The versatile textile and second skin fit span seasons wear it over a skin layer or summer weight jersey in the spring and fall, and layer it