Socks Fitted X-Large SFI 3.3 Fire Resistant

The Socks Fitted X-Large SFI 3.3 Fire Resistant from PXP RACEWEAR are purpose-built protective footwear engineered for high-heat motorsports environments where standard socks fail. Whether you're running drag racing, road course competition, or performing extended mechanical work around engine bays and welding operations, fire-resistant socks are a critical safety layer that protects skin from flash fire, sustained heat exposure, and ignition hazards. These X-Large fitted socks meet SFI Foundation 3.3 certification standards, the governing performance benchmark for racing apparel in sanctioned competitions.

Constructed from Lenzing FR fibers, these fire-resistant socks deliver inherent flame protection without synthetic chemical coatings that degrade over wash cycles. The fitted cut in X-Large sizing provides snug ankle and arch support during high-g cornering and sustained pedal work, eliminating bunching inside racing boots that can create pressure points during multi-hour endurance events. The black colorway maintains professional appearance while concealing minor wear, and the technical weave structure wicks moisture away from skin while maintaining the thermal barrier that makes SFI 3.3 certification meaningful—protection that persists through repeated laundering and extended use.

Competition drivers, pit crew members, and automotive technicians who work near high-temperature zones benefit most from SFI 3.3-certified footwear. These socks pair seamlessly with fire-resistant suits, gloves, and boots as part of a complete safety ensemble—each layer rated to the same SFI standard ensures no weak points in thermal protection. The X-Large sizing accommodates drivers with larger feet or those wearing thick racing boot liners, and the fitted profile works within all major racing boot brands including Simpson, Alpinestars, and OMP models. For sanctioned racing events, tech inspectors will verify SFI certification compliance, making this product essential rather than optional.