The breathable plug is a kind of sealing accessory, which can allow gas molecules to pass through while blocking liquids and larger particles, so as to realize the function of breathing and impermeable. Breathable plugs are therefore very desirable in many applications, particularly where it is important to allow gas exchange whilst ensuring that liquids do not penetrate. Plug that Provides Protection to Sensitive Electronic Components and Products and are Reduces the Failure of Electronic & Sensor Product Caused by Salt Corrosion.