Sizing: The Simpson Hybrid Sport Head & Neck Restraint size that you require will vary depending on the circumference of your chest whilst wearing all racewear needed in a motorsport event. All measurements should be taken in centimeters from below your chest muscles in order to obtain an accurate reading. X-Small – 81cm-91cm Small – 91cm-102cm Medium – 102cm-112cm Large – 112cm-122cm X-Large – 122cm-132cm Approval: FIA 8858-2010 Approved Features: Sliding Tether Mechanism Premium Composite Construction Unparalleled Impact Protection & Device Stability Ergonomic Design Multiple Load Paths To Dissipate Head Loads
