Simpson’s Hybrid S restraints are not only both FIA and SFI-approved for competition use with multi-point racing harnesses, these head and neck restraint systems have also been tested, and shown, to be compatible with standard 3-point safety belts as found in street vehicles. This allows driving instructors, auto manufacturing test engineers, and other vehicles with 3-point harnesses to have additional protection.

Additional details include:

* FIA and SFI-approved with 5, 6, and 7 multi-point harness systems
* FMVSS tested for use with 3-point OEM belt system
* High-quality carbon fiber construction
* Low-profile (no high back to hook on the bars on exit)
* Multiple load paths to dissipate head loads
* Buckle attachment in front (no bulky straps underneath)
* Installation manual