TPU = Thermoplastic Polyurethane Elastomers . An exceptional environment-friendly membrane which is engineered by unrivalled high-technology . TPU has qualities such as flexibility at low temperatures, impact-resistant and flexural in bending . And not only it's extremely good resistance to penetration and tear propagation but also to weathering . Plus TPU has non-toxic, recyclable, buried , no pollution by burning and decomposable features can be definitely becoming the updated environment-friendly material .