The Cinturato SmarTUBE provides all the benefits of TPU (Thermoplastic Polyurethane) — superior puncture resistance, a low weight, and a compact size. The Cinterato SmarTUBE's outstanding resistance against cuts and punctures is the result of a specific TPU formulation tailored to gravel riding. The goal of the Cinturato SmarTUBE was to obtain the highest protection possible without affecting weight and compactness — and let's just say that goal was obtained. It's truly the ultimate solution for cyclists that take long, remote rides or multi-day bikepacking trips. The low weight and compact size of the tube are crucial when packing water, food, and extra clothing. On top of that, you never want to be in the middle of the wilderness without a spare tube to get you back home.