Schwalbe durano plus folding tyre smartguardmaximum puncture protection for race machinesdurano plus with a new dynamic profile the smartguard belt is not as deep as the marathon pluss nevertheless it offers a unique level of protection for racing tires this is the most puncture protected road bike tire smartguardthe most efficient protection belt there is for bike tires in other words flatless solid 5mm thick layer of highly flexible special rubber provides permanent protection also