Cinturato SmarTUBE is great for those who travel and explore the world on their bikes. It saves space and weight leaving room for water, food and extra clothing. The best companion of adventurers. The replacement of butyl with TPU (Thermoplastic Polyurethane) gives the Cinturato SmarTUBE its unique features, a technical innovation that redefines the concept of inner tubes, both for everyday use and as a spare tube. The outstanding resistance against cuts and punctures of Cinturato SmarTUBE is the result of a specific formulation which is different from the road-specific P ZERO SmarTUBE, the goal was to obtain the highest protection possible without affecting weight and compactness