capucha sparco hood rw 4 non fia sfiThe RW 4 NON FIA SFI underwear line uses the exact same material as the homologated RW 4 underwear, the only difference being the configuration of the underwear. The FIA and SFI do not homologate short sleeve jerseys, boxer shorts or single layer balaclavas. The RW 4 NON FIA SFI underwear is an option for drivers who do not race professionally but still want more protection for track days. TECHNOLOGY Soft and comfortable Normal fit NO FIA SFI