BERING "porthole" winter cowl in zirtex ZIRTEX "porthole" cowl is weaved with a thread consisted of dioxide of Zirconium, a molecule used in the thermal protection of the shields of space shuttles. This high technology allows to obtain unequalled results on several points: thermal Barrier, long-lasting elasticity, evacuation of the humidity, the sustainable antibacterial treatment. With zirtex "porthole" cowl from BERING and its neck protection, take advantage of the high technology in the service of your well-being, in motorcycle! standard size REF: ACF470 Silverstonemotor advice : for a great protection of face and neck in middle season and winter riding conditions