Underwear PRO-TX Top Black Medium SFI 3.3

The Underwear PRO-TX Top Black Medium SFI 3.3 is a professional-grade fire-retardant base layer engineered for motorsports, racing, and high-heat environments where thermal protection is non-negotiable. Designed for drivers, pit crew, and motorsports enthusiasts who demand SFI certification, this long-sleeve crew neck top provides a critical layer of defense against flash fires and extreme temperatures. Its lightweight construction makes it ideal for wear under racing suits, nomex overalls, or as a standalone base layer in demanding applications where compliance with safety standards is mandatory.

Built from a fire-retardant blend fabric, the PRO-TX top meets SFI 3.3 specification requirements, which governs protective apparel for automotive racing. The crew neck design and long sleeves maximize coverage, while the material's inherent flame resistance provides continuous protection without degradation from washing or wear. At just 0.55 lbs, the medium-size top offers minimal bulk, ensuring unrestricted mobility in the cockpit or pit lane. The fire-retardant blend maintains breathability and comfort during extended use, critical when operating in high-temperature conditions where overheating compounds fatigue and performance loss.

Motorsports professionals, amateur racers, and safety-conscious drivers rely on SFI 3.3-certified base layers to meet sanctioning body regulations and reduce injury risk in accident scenarios. The medium size accommodates standard athletic builds and fits comfortably under full racing suits for extended competition sessions. This top is essential for anyone competing in sanctioned racing events, vintage car shows with safety requirements, or working in environments where fire-retardant apparel is a best practice. Pair with matching fire-retardant bottoms and a racing suit for complete thermal protection compliance.