Traps micro-particles associated with allergies, like ragweed and pollen - Intrepid Filtration Media improves filter performance Industrial-strength construction. Features - Traps micro-particles associated with allergies, like ragweed and pollen - Intrepid Filtration Media improves filter performance. Description Traps micro-particles associated with allergies, like ragweed and pollen - Intrepid Filtration Media improves filter performance Industrial-strength construction.