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The Bell Sport-TX underwear bottom is a certified SFI 3.3/5 base layer in black sized X-Large, intended for motorsport use under a fire-resistant outer suit. It identifies as a purpose-built layer that supports driver safety standards while remaining low-profile under race gear. Use it as the underlayer in competition or track-day setups where SFI-rated garments are required.
Bell Sport-TX Underwear Bottom Black X Large SFI 3.3/5
