The smart system has a double system for optimum performance in cold weather

protective

providing expansion when the airbag inflates but also offering a high level of anatomical performance and a superior fit when riding without the system fitted

and a Nucleon Flex Pro divided chest protector

lite dura softshell jacket black bright red white Size:XXL The smart system has aAlpinestars crafted the new Lite Dura line with the rigorous demands of enduro riders in mind, creating a range of gear that provides high levels of versatility, modularity, comfort, protection, and style, allowing riders to tackle the trails with confidence and pursue the thrill of off road riding to the fullest.