Underwear Bottom Black Large

The PXP RACEWEAR Underwear Bottom Black Large (SKU: PXP124) is a specialized fire-resistant base layer engineered for high-performance motorsport and racing environments. Designed to meet SFI 3.3 safety certification, this garment provides essential thermal protection and flame resistance for drivers, pit crew, and automotive enthusiasts who operate in extreme-heat or fire-risk conditions. Whether competing on track or working in demanding automotive settings, this underwear bottom delivers the protective foundation required by sanctioning bodies and safety-conscious racers.

Constructed from Lenzing FR (flame-resistant) fiber, the Underwear Bottom Black Large offers inherent fire-retardant properties that do not diminish with washing or extended use. The fabric technology provides reliable thermal barrier performance while maintaining breathability and comfort during prolonged wear under racing suits and protective gear. The SFI 3.3 rating confirms compliance with racing safety standards, ensuring the garment meets rigorous flammability and performance benchmarks required by major motorsport sanctioning organizations. The black colorway offers versatility and conceals wear, making it practical for repeated use across training, practice, and competition.

This product is ideal for professional and amateur racers, automotive technicians working in high-temperature environments, and motorsport safety-conscious individuals seeking compliant base layers. The large sizing accommodates a range of body types while maintaining proper fit under racing suits. Users benefit from layering the Underwear Bottom Black Large beneath SFI-rated racing suits for multi-layer protection in open-cockpit vehicles, closed-course competitions, and sanctioned events. The lightweight construction (0.55 lbs) minimizes bulk without compromising thermal performance, making it suitable for year-round motorsport applications where fire safety and comfort are non-negotiable.