Underwear Top FR Black XX-Large SFI 3.3

The Underwear Top FR Black XX-Large SFI 3.3 is a fire-retardant base layer engineered for high-performance motorsports and automotive racing environments. Designed for drivers, pit crew, and performance enthusiasts who demand protection in extreme heat conditions, this long-sleeve garment serves as the critical first line of defense beneath racing suits and fire-resistant outer layers. SFI 3.3 certification ensures compliance with the Society of Automotive Engineers' stringent thermal protective standards, making it essential for sanctioned competition and professional racing applications.

Constructed from a fire-retardant blend fabric, the Underwear Top FR features a high collar design and full-length sleeves to maximize skin coverage and thermal protection during vehicle operation. The flame-resistant material is engineered to resist ignition and self-extinguish while maintaining breathability and comfort during prolonged wear—critical for maintaining focus during competitive driving or high-stress mechanical work. The black colorway provides professional aesthetics while concealing wear and dirt common in racing and shop environments, and the XX-Large sizing accommodates broader frames without restricting movement or airflow during intense driving dynamics.

This fire-retardant base layer is ideal for drivers competing in drag racing, road course events, circuit racing, and off-road motorsports where SFI-certified protective gear is mandatory or strongly recommended. It pairs seamlessly beneath racing suits and fire-resistant driver suits, providing an integrated thermal barrier without bulk or compromise to mobility. Whether you're a weekend racer at a local track or a professional competing at sanctioned events, the SFI 3.3 certification and reliable flame-resistant construction deliver the confidence and protection required to stay focused on performance. The lightweight design—weighing just 0.73 lbs—adds minimal weight while delivering maximum safety compliance.