Underwear Top FR Black 3X-Large SFI 3.3

The RACEQUIP Underwear Top FR Black 3X-Large SFI 3.3 is a professional-grade fire-retardant base layer designed for drivers who demand maximum safety in high-performance and motorsport environments. Built specifically for use under racing suits, this long-sleeve undershirt meets SFI Foundation 3.3 certification—the gold standard for automotive racing apparel. Whether you're running road course events, drag racing, or simply upgrading your shop safety gear, this fire-resistant underwear provides essential thermal protection in case of engine bay fires or fuel-related incidents.

Constructed from a specialized fire-retardant blend fabric, the Underwear Top FR delivers reliable flame resistance without compromising breathability or comfort during extended driving sessions. The high collar design protects the neck area—a critical zone in racing accidents—while the long sleeves ensure full arm coverage. SFI 3.3 certification guarantees that this garment has undergone rigorous heat and flame exposure testing, meeting strict industry standards for afterburn and shrinkage. The 3X-Large sizing accommodates drivers who need roomier fit without sacrificing the snug underlayer performance required for proper racing suit operation.

This base layer is essential for serious motorsport competitors, vintage hot rod builders, and professional mechanics working in high-risk automotive environments. The black colorway maintains a professional appearance under any racing suit or jacket, making it equally suitable for track days, autocross events, or daily driver modifications where fire safety is a priority. Pair it with an SFI-rated racing suit for complete compliance at sanctioned events. Machine washable and designed for durability, this undershirt becomes the foundation of your motorsport safety system—protecting skin and reducing injury severity in worst-case scenarios.