CHALLENGER SFI RACING SUIT JACKETThe K1 Challenger SFI Racing Suit Jacket features an SFI 3. 2A 1 rating and is manufactured using the highest quality, treated FR Cotton available on the market. Ideal for entry level racers, pit crews, race officials, and mechanics participating in series that do not require Nomex or other aramid fabrics, K1s Challenger PROBAN cotton jacket is the logical choice for safety and affordability! The Challenger Jacket is ideal for a variety of racing