SFI 3.3 FR Underwear Bottom Black 4XL

The SFI 3.3 FR Underwear Bottom Black 4XL is specifically designed for drivers and mechanics who work in high-heat automotive environments. This garment is essential for those who require thermal protection and fire resistance while performing their duties, whether on the racetrack or in the engine bay.

Constructed to meet SFI Foundation safety standards, this underwear bottom provides critical fire-resistance and thermal protection in high-temperature or flame-exposure scenarios. The lightweight design ensures comfort and mobility, making it ideal for extended wear during racing or mechanical work.

Professional racers, pit crew members, and automotive technicians will find the SFI-rated base layer beneficial when working with fuel systems or in environments with welding operations. This garment pairs seamlessly with matching SFI-rated fire suits, ensuring a complete protective ensemble.