When the world-class cyclists start the Tour de France, their helmets are made of polycarbonate that uses chlor-alkali chemistry. Polycarbonate is a strong material that can maintain its toughness even in high temperatures. Their bicycle frames, tyres and saddles are also made from Chlorine-derived materials and many of their cycling shoes will contain Polyurethane, an important Chlor-Alkali material that provides comfort and support in all types of terrain.