Material:Polyester (PET), polypropylene (PP), Fiberglass, METAMAX, FMS, P84, Acrylic, PTFE Membrane ... Nonwoven Needle Felt Filter Cloth forDust filter bagsMaterial: Polyester (PET), polypropylene (PP), Fiberglass, METAMAX, FMS, P84, Acrylic, PTFE Membrane ... repellent, PET membrane, Acrylic. High temperature products: FMS, Nomex, PPS, PTFE, fiberglass, p84 fiber.Faithful Manufacturer is supposed to be ...