From the surface, there will be some obvious pressure points on both sides of the waterproof and breathable membrane. From this basic feature, you can know whether the purchased waterproof and breathable membrane is genuine. Therefore, in order to avoid buying fake waterproof and breathable membranes, you must learn the identification method before buying it. It is possible to use the correct method to identify it reasonably. Therefore, a simple detection based on the pressure points on both sides is enough.
It can be tested by the manufacturer: whether it is really waterproof and breathable membrane, the manufacturer can tell at a glance. Therefore, if you cannot identify the authenticity of this waterproof and breathable membrane, you can send the waterproof and breathable membrane you bought to a regular manufacturer, and let these manufacturers help you identify it so that you can see the true and false at a glance. If it is real, you can buy it with confidence, but if it is fake, you must be careful not to buy it.