Breathable waterproof TPU film has a hand feeling similar to human skin. Its high elasticity ensures good adaptability to all parts of the human body. Its moisture permeability can ensure the normal breathing of human skin and reduce the occurrence of allergies.

　　The principle of gas permeability is to use the special molecular structure of the breathable waterproof TPU film. The hydrophilic group leads the water molecules from the side with high water vapor partial pressure to the side with low partial pressure of water vapor, because it is not wetted by micropores. It has good resistance to liquid permeability and high water vapor permeability.