itg were one of the first companies to manufacture a truly durable, high performance foam-based production air filter. itg list the following three benefits of their foam technology:

• Maximum Air Flow - the ability to allow air to pass through without causing a large drop
  in pressure.
• Cleaning Efficiency - the capability to arrest a high proportion of airborne dust while feeding the engine clean air.
• Dust Load-up Tolerance - the capability to absorb a large amount of dust without reducing air flow capacity.

itg's unique Tri-Foam System uses various thicknesses of finer or coarser foams which can be varied for different applications.

The use of the very latest adhesive technologies to bond the foam layers together results in filters that are totally resistant to water, fumes, oils and fuels - including the exotic brews used in racing.