The K1 Challenger suit is a single layer SFI-1 race suit manufactured with high quality, treated FR Cotton and is ideal for entry level racers, pit crews, race officials and mechanics. If the race league that you compete in does not require Nomex fabric, our Proban cotton fire suit is the logical choice! Providing superb protection in the event of a fire and Meeting stringent SFI 3.2A/1 certification standards, our K1 single layer race suit is an ideal fire suit for a variety of racing classes, including dirt track and oval racing leagues such as Midgets, Quarter Midgets, Bandoleros, Sprint Cars, Legends, and Thunder Roadsters as well as sports car racing classes such as SCCA Solo and ProSolo. We are confident that you will not be disappointed in our K1 SFI.1 race suit! Features: SFI 3.2A/1 Rated for Competition Lightweight, Single Layer FR Cotton Material 360 Degree Shoulder Gussets Boot Cut Legs Available in Sizes 7XS - 4XLProduct Description: Firesuit, Challenger, 1 Piece, SFI 3.2A/1, Single Layer, Fire Retardant Cotton, Boot Cut, Black, Large, EachPit Stop USA offers K1 RaceGear Challenger Suit - Black, White - Large 56 20-CHL-NW-L at low everyday prices. Be sure to check out all our products from K1 RaceGear including K1 RaceGear auto racing suits.