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The RaceQuip SFI 3.3 underwear bottoms are black, SFI 3.3–certified flame-resistant undergarments in 4XL. Intended to be worn under a race suit, they provide SFI 3.3 protection for motorsport applications. Pair with the matching SFI 3.3 top to secure complete certified undergarment coverage and ensure proper fit beneath approved outer protective gear.
RaceQuip Black SFI 3.3 Fr Underwear BTM - 4XL
