The Angel(TM) SmarTUBE X is Pirelli's latest innovation in the world of tubes designed to protection and confort for daily riding and fast urban commuting. The Angel(TM) SmarTUBE X is made with TPU, a material that can save up to 70% of the weight while being stronger than butyl as a raw material. This product is 3 times thicker than a standard SmarTUBE, and allows the cyclist to be more agile while being extremely protected at the same time. The Angel(TM) SmarTUBE X comes with either a Presta and Schrader valve, availabe in a comprehensive range of heights to fit every rim and set-up out there.