AN AUTHENTIC REVOLUTION. Tannus anti-puncture tires are made of a worldwide patented material called Aither. This material made from polymers and olefin co-polymers contains about 1,000,000,000 (billion) micro “bubbles” of closed air in each tire, representing a real revolution among bicycle tires. In 2015, we launched the evolution of the compound; the Aither 1.1 where we achieved a performance comparable to that of traditional tube tires, but with greater benefits. This 2020 some models are already manufactured with the compound Aither 1.1 Evo and the result is spectacular! Can you imagine how the future will be with the version Aither 2.0 Price for 1 pair