Surface Coatings and Chemical Impregnations to improve dust cake release, as well as provide a Hydrophobic and Oleo phobic finishes. Available in Polyester, Cotton, Polypropylene, Polyamide & Aramid staple, multifilament and monofilament yarns as finished bags. In most cases Synthetic Spider-Web Filter Cartridges are custom made in various sizes and constructions to fit your specific requirements, along with high temperature capabilities, fire retardant, PTFE membrane, conductive and high efficiency type materials