Proprietary Polyester MeshHydrophobic Water-Repellent ProcessUV ResistantFilters Debris Down to .005”Shatter Proof In Freezing TemperaturesResistant to Heat Up to 450 DegreesPuncture ResistantElasticity Characteristics Allowing The Threads to Return to The Original PositionExtends The Time Between Filter Servicing IntervalsMade in USAOver 25 Years of Product DevelopmentOriginally Developed For Off Road ApplicationsPre-Filter Custom Tailored for Agency Power FiltersSold As Pre-Filters Only NO Air Filters Included