SFI 3.3 FR Underwear Bottom Black XSM

The ALLSTAR PERFORMANCE SFI 3.3 FR Underwear Bottom in Black X-Small is a fire-retardant undergarment engineered for drivers, pit crew, and motorsports professionals who operate in high-temperature environments where fuel and ignition hazards are present. Built from a specialized fire-retardant blend fabric, this bottom meets SFI Foundation 3.3 safety certification—the industry standard for racing apparel designed to provide critical thermal protection in emergency situations.

SFI 3.3 certification indicates the fabric has been tested and approved to resist ignition and limit flame spread in accordance with competitive motorsports safety regulations. The fire-retardant blend construction maintains flexibility and breathability during extended wear while delivering the thermal barrier necessary in racing, drag racing, and off-road competition environments. Available in black, this bottom integrates seamlessly with other SFI-rated racing gear as part of a complete fire-resistant racing suit system. The X-Small sizing accommodates drivers and crew members requiring a compact fit without compromising coverage.

This undergarment is essential for anyone involved in sanctioned motorsports competition or professional racing operations where SFI-rated personal protective equipment is required or strongly recommended. Whether in a single-seater cockpit, a pit crew uniform, or an off-road racing role, SFI 3.3 base layers are recognized by racing organizations, insurance carriers, and safety officials as a foundational element of proper fire-resistant racing apparel. ALLSTAR PERFORMANCE's racing heritage positions this product within the trusted ecosystem of motorsports safety equipment.