The RaceQuip® 360 Degree 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.