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The RaceQuip 360° SFI Helmet Support, also sometimes incorrectly called a neck brace, is made of high-density flame retardant foam which is covered with a woven FRC fabric. The round 1-3/4" to 2-1/4" tall tapered wedge design plus the Hook & Loop closure make our helmet supports comfortable and easy to use. Meets or exceeds SFI 3.3 certification.