R E V O L O O P ® bicycle tubes are made from a high-tech plastic based on thermoplastic polyurethane (TPU). The material properties of TPU make them exceptionally light and at the same time extremely puncture-proof. The TPU material enables us to tailor specific hose properties to your requirements and your preferred area of ??use when biking. The decisive factor is that all R E V O L O O P ® products are lighter and more puncture-proof than conventional butyl tubes.