As the sport of motocross grew in popularity, it became clear that the air filter technology at the time was inadequate. The filter itself was made of paper with a single layer of foam and could not be moacute; provide sufficient protection against the sandy driving conditions in the dunes and fields of the Netherlands. In 1972, the motocross world got a historic boost with a revolutionary new product: a flame-laminated, two-stage foam air filter that works; After being soaked in a special oil, it allowed air to flow freely into the carburettor, while ensuring maximum protection of the engine against sand, dirt and water particles. It was not only effective, but durable, washable and reusable. Product Description Brand: Lopor Material: flame laminated, two-stage foam Color: as the picture shown (actual pictures) Quantity: 1 Features: fused-dual-layer construction (now widely copied) combined perfor-mance and protection. Bonded foam layers with