Dual-Stage Foam Air Filters for motocross, enduro, ATV, and scooter   Constructed from two layers of open pore foam to provide excellent airflow and maximum filtration. The coarse outer layer traps larger particles of dirt and water, keeping the fine inner layer free to trap fine dust particles.   Hiflofiltro dual-stage foam filters are designed to be cleaned and re-used over and over again. The two foam layers are flame laminated together to provide a durable, permanent bond. The filter is constructed from pieces of dual-layer foam bonded together, using a specially formed adhesive that isunaffected by repeat cleaning and oiling cycles.   Developed and made in the Netherlands.