Green and white cotton is a common air filter material, made of encrypted and thickened synthetic fiber, green and white cotton filter material is green and white, green side is the air upwind side. Green and white cotton has good filtering effect, can effectively filter particles and impurities in the air, and has low wind resistance. At the same time, green and white cotton is also suitable for some high temperature environment filtration needs. It is often used to filter dust and particulate matter in ventilation and air conditioning systems, clean workshops and clean rooms.