It is made of continuous monofilament fiberglass with gradual density. The air inlet side is green; the air outlet side is white. Low compressibility keeps its shape and makes air filtered effectively. It can absorb the excess particles during paint-spraying operation and reducing pollution to the environment, makes the exhausted air more environmentally friendly and the inner circulating air cleaner.The products are mainly used for pre-filtration and purification systems, for example in spray booths or painting rooms to capture overspray paint.