Replacement Filter for Twin Air Power Flow Kit Dual Foam design; Thick porous foam catches airborne dirt, Mugre and foam interior of sand, porous texture acts as a second filter to capture particles smaller than to time which ensures maximum air passage Often, support foam, greaseless sealing ring ensures maximum contact with the filter air box, while acting as a breathable gasket for increased air to circulate fusionado elements prevent dirt and the Mugre Fountain of inside and outside is between layers while the exclusively formulated adhesive ensures glue seams will not break