Vittorias Ultra Light Speed inner tubes are made with thermoplastic polyurethane. Besides being completely recyclable, this material offers excellent technical characteristics; it is steady from -47C up to +100C. It can be consistently extruded in very thin thicknesses. It has a good elasticity and it is completely airtight, which allows keeping constant air pressure inside for long time. It is resistant to punctures and in case of puncture, the flow of air is slower compared to butyl and latex, which translates to increased safety.