The aFe Pro Guard 7 performance air filter represents the next generation of performance filtration. The Pro Guard 7 air filter is constructed of pliable urethane with a bump seal for a leak free seal. The filter media is constructed of 7-layers, 5-layers of progressive cotton gauze and 2-layers of synthietic dry media for maximum filtration. This filter is for riders that choose to ride in the most extreme conditions. Deeper, rounder pleats offer more filtering area than other foam or cotton gauze filters.