The ePTFE waterproof and breathable membrane uses PTFE resin as raw material, through a special process, two-way stretching, and unique technology to form ePTFE into a microporous film with a diameter of 100-500 nanometers, and it has more than 1 billion holes per square centimeter. 700 times larger than water vapor molecules and 10,000 times smaller than water molecules, the membrane allows air and water vapor to pass through the membrane freely, and at the same time keeps water out of the membrane, effectively protecting the service life of electronic components.