... 3. Equalize pressure, 4.gas permeable, oleophobic , 5.waterproof , Protective vents Reduce condensation, prevent contamination, Equalize pressure, gas permeable, oleophobic , ... — improved reliability and extended product life.Pan Asia microvent protective vents IP rate is divided into 4 rates ,IP65, IP67, ... Maritime Dangerous Goods Code"(IMDG CODE) strict requirements. protective breath vents