The Stand 21 Club Series 3 Head and Neck Restraint is constructed of thermoplastic-injected resin reinforced with carbon fiber which combines excellent protection in a lightweight, affordable package. The Club 3 uses a proprietary honeycomb architecture not found in other devices at this price point. The results is a superior strength to weight ratio. The self-neutralizing, floating single-tether design allows for maximum mobility while providing a high level of protection at multiple angles. The Club 3 is both FIA 8858-2010 homologated and manufacture certified to SFI 38.1, making the device suitable for use in most series around the world.SFI 38.1 CertifiedFIA 8858-2010 HomologatedConstruction - Carbon Fiber infused thermoplastic injected resinLightweight - Large is only 1lb. 7oz. (640 grams)Exceptional ergonomics and comfortSelf-neutralizing single-tether for maximum mobilityCarry bag and clavicle padding includedAvailable in Medium or Large20 Degree angle for use with most seat back anglesMade in FranceCompatible with Hans post anchors (Not included)Compatible with Hans post anchors that come pre-installed on FIA 8858-2015 helmets