Underwear Bottom FR Black XX-Large SFI 3.3

The RACEQUIP Underwear Bottom FR Black XX-Large SFI 3.3 is a fire-resistant base layer garment engineered for drivers and pit crew who operate in high-heat environments where flame protection is mandatory. Built from Nomex fabric and certified to SFI 3.3 standards, this underwear bottom provides essential thermal protection beneath racing suits, nomex suits, and other race gear during extended competition or training sessions.

SFI 3.3 certification indicates this garment meets the Safety Standards for Single-Layer Racing Underwear established by the Sports Car Club of America and recognized across motorsport disciplines. Nomex material resists ignition and self-extinguishes when exposed to flame, a critical property in racing environments where fuel spills or contact with hot surfaces are real hazards. The XX-Large sizing accommodates a full range of motion during long driving sessions while maintaining consistent protection. This individual bottom can be paired with a complementary SFI-certified top to create a complete racing underwear system.

Racing drivers, professional pit crew, and serious track enthusiasts rely on SFI 3.3 rated underwear as a foundational safety layer beneath their race suit. Whether preparing for road course competition, drag racing, off-road racing, or sim racing at serious levels, this base layer works to protect against thermal threats that standard athletic wear cannot address. Stock replacement pairs ensure drivers can maintain consistent protection across multiple events or training days.

Fire-resistant racing underwear is not optional equipment—it is a recognized safety standard across sanctioned motorsport. The black color complements any race suit and maintains visibility of wear or damage. RACEQUIP is an established manufacturer of SFI-certified racing safety apparel used by drivers across multiple racing disciplines.