Breather membrane is a kind of NM breathable film using the special nanometer breathable materials and advanced production technology to form a high-tech gas-liquid separation film in the substrate surface. It can pass through the liquid while preventing liquid from passing through. This product is suitable for vacuum-assisted resin infusion (VARl), allowing the air to be evacuated continuously and keeping the resin from losing. It is highly recommended to be used in the one-way breathable film in the blade productive process.