How to distinguish true and false waterproof and breathable membrane

Waterproof and breathable membrane is a relatively good waterproof material, this waterproof material is a new type of polymer waterproof material, and the manufacturing process is very good. Because of the good effect of the material, it is widely used in the industrial field.

However, there are many businesses on the market that sell fake waterproof and breathable membranes. Therefore, when buying a waterproof and breathable membrane, you must learn to distinguish between serious and fake, so that the waterproof performance of this material can be better. However, what method should be used to distinguish the authenticity of the waterproof and breathable membrane?