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The Bell Sport-TX underwear bottom in black (2X-Large) carries an SFI 3.3/5 rating and serves as a certified base layer for motorsport applications. Built to be worn under a racing suit, it provides compliant coverage without bulk. Choose this size when you need a roomy, SFI-rated undersuit layer for competitive events or serious track use.
Bell Sport-TX Underwear Bottom Black 2X Large SFI 3.3/5
