The filter media of the our Compact pocket filters are made of break-resistant synthetic-organic fibers and microfibers - no glass fibers. The filter pockets are leak-free welded and foam-sealed into the front frame to preclude dust breakthrough. High dust holding capacity and long useful lifetime are ensured by the single- or multi-layered progressive structure of the filter media as well as the inherent rigidity of the filter pockets. The low average pressure drops and optimized aerodynamics together with full utilization of the filtering area available result in reduced energy costs. JM Compact pocket filters ensure maximized functional reliability even under temporary overloading and are maintenance-free over their entire operational lifetime. They are non-corroding, moisture-resistant up to 100% relative humidity, thermally stable up to 70°C, and disposal-friendly. JM Compact pocket filters are microbiologically inactive and meet all hygiene requirements for HVAC systems