The Delta RW-6 NON-FIA line of undergarments are designed to provide both comfort and protection to the driver. The NON-FIA DELTA RW-6 uses the same exact material as the FIA homologated Delta RW-6, the only difference is in the undergarment configuration. The FIA does not homologate short sleeved shirts, boxer short lowers and single layer balaclavas.  The DELTA RW-6 NON-FIA is an option to drivers who are not professionally competing but would still like more protection on the track.