| Advantages of Pleated Filters For years, Bag Filters have been the staple filtration mechanism for dust collectors. Increasingly these are being to replaced by newer technologies such as Pleated Filter Bags (Or Pleated Media). Pleated Filtration Media generally has a few advantages over traditional filter media. The pleats greatly increase filter surface area allowing for lower air to cloth ratios in the same space. Layers of deep pockets made of woven fabric allow for higher dust retention rates. Additionally, with shorter overall bag lengths Pleated Filter Bags remain above the inlet gas stream, reducing abrasion caused by incoming dust particles. Pleated bags are designed to replace fabric bag filters and cages used in many dust collectors.