TPU waterproof and permeable membrane is a new type of polymer waterproof material. It is the main material of polyurethane (TPU) and is introduced to hydrophilic base. The surface of the film has no micropores, so it can be protected against wind and water. Because tpu film has a hydrophilic base, it can be permeable through hygroscopic conduction. It is often used in clothing fabrics, home textile composite, mountaineering clothing, ski shoes and other fields.