Sub Zero Controlled Decelerator – the ONLY one of its kind. Period.

A rendering of IMMI's Sub Zero static harness is shown.There is only one static 4-point harness that takes safety to a superior level, and that’s IMMI’s Sub Zero.

IMMI’s Sub Zero Controlled Decelerator is the only static restraint of its kind that gives you the secure feeling of a harness, along with innovative protection you won’t find anywhere else. Other 4- and 5-point harnesses may cause submarining – which means you slide forward and underneath the harness during a crash. Submarining may lead to more severe injuries to your head, neck, and internal organs.

Sub Zero can reduce submarining through patent-pending, controlled deceleration technology, which softens the impact of a crash on your body. It’s also the only harness of its kind with an indicator that alerts you when you need to replace the harness.

A comparison illustration demonstrating how Sub Zero can offer enhanced protection in a crash.

Easy to buckle up and adjust, this harness offers one point of connection and release.

Crash tested at CAPE, the Center for Advanced Product Evaluation, Sub Zero has also been extensively ride tested to give you the best comfort, durability, and safety. When it comes to 4- and 5-point harnesses, riders agree. IMMI’s Sub Zero Controlled Decelerator is the ONLY one of its kind. Period.


  • More comfortable.
  • Exclusive controlled deceleration technology.
  • Reduces submarining.
  • Easy one click buckle.
  • No uncomfortable crotch strap.
  • Secure restraint allows for better vehicle control and less ride fatigue.
  • The only harness with an indicator alerting you to replace your belt when needed.
  • CAPE and Polaris tested for your safety and comfort.