Uni Filter has one of the world's largest ranges of automotive air filters, proudly manufactured in Australia. Uni Filter panel filters use two layers of foam. The outer layer is the work stage and the inner layer is a back up stage. Effectively it’s two filters in one. Foam is also the best filtering material for dusty conditions. When the correct oil is used on foam filters they will continue to breath and filter, even when dirty. If you drive or ride off road you can be sure that Unifilter will protect your engine like no other air filter can ! In excess of 7000 air filters available for Cars, SUV, 4x4, Motorcycles, ATV's, Trucks, Performance, Universal and Industrial air filters. Their development programs and leading edge CNC manufacturing techniques are second to none. Dust & sand won't get caught between the two layers, although they can be removed, separated & cleaned. The outer layer does all the work and the inner layer is a safety stage.