Head and Neck Restraint

What Is a Head and Neck Restraint?

A head and neck restraint (HNR) — also known as a Frontal Head Restraint (FHR) or HANS device — is one of the most critical pieces of safety equipment a motorsport competitor can wear. Head and neck restraints are shoulder-mounted devices that connect to a driver's helmet via flexible tethers. In a crash, when a seatbelt arrests the motion of the body, the unprotected head can continue moving forward with tremendous force. The HNR limits this movement, transferring energy away from the vulnerable cervical spine and into the far stronger chest, torso, and shoulder structure.

The physics are stark: in a frontal impact, a driver's head and neck can be subjected to forces of up to 50g. By limiting the travel of the head and neck, these devices dramatically reduce the risk of basilar skull fractures, concussions, and severe whiplash — injuries that were historically common and often fatal in motorsport crashes. Early crash testing showed that a properly designed restraint could reduce the energy exerted on the head and neck by approximately 80%, and reduce critical neck tension thresholds from over 700 lbs down to around 210 lbs.

Why Head and Neck Restraints Are Mandatory

Today, head and neck restraints are not optional — they are mandated by virtually every major motorsport sanctioning body. Top-tier series like NHRA, NASCAR, IndyCar, and the World Endurance Challenge require them, as do club and sportsman-level divisions within SCC and IMSA. The FIA made their use compulsory for all international-level events beginning in 2009. Whether you race on a local circuit or compete professionally, an FIA 8858-certified or SFI 38.1-approved device is essential for both your safety and regulatory compliance.

What to Consider When Buying a Head and Neck Restraint

Selecting the right HNR involves more than simply picking a brand. Here are the key factors to evaluate:

• Layback Angle: Devices are available in 20-degree and 30-degree angles. The 20-degree version suits more reclined seating positions common in formula and prototype cars; the 30-degree angle is intended for more upright saloon, GT, or rally car seating positions.
• Size and Fit: Devices come in multiple sizes based on collar/neck measurement. A proper fit ensures the tethers align correctly with helmet anchor points.
• Material: Carbon fiber models offer maximum weight savings and are preferred for professional-level competition, while reinforced polymer models deliver excellent safety at a more accessible price point.
• Tether and Anchor Compatibility: Ensure the device's tethers and anchors are compatible with your specific helmet. Not all helmets include anchor posts as standard equipment.
• Harness Compatibility: A 2-inch shoulder strap harness typically allows for easier fitment of tethers compared to a 3-inch strap.
• Certification: Always verify the device carries current FIA 8858 or SFI 38.1 certification to meet your series' rulebook requirements.

Top Head and Neck Restraint Brands

Simpson Racing Equipment is one of the most recognized names in motorsport safety, offering the popular Simpson Hybrid line of head and neck restraints. The Hybrid design uses a harness-based attachment system that keeps the device securely positioned relative to the torso — even through multiple impacts in a rolling or tumbling crash — making it a trusted choice across formula racing, touring car, and rally categories.

Hans Performance is the originator of head and neck restraint technology, producing the HANS device that gave the entire product category its widely-used name. Their lineup ranges from entry-level polymer models like the HANS IV to elite, hollow-core carbon fiber options like the HANS Pro Ultra Lite, providing solutions for drivers at every level of competition — including youth sizes for junior racers.