Houdini 31 7-Point Harness

HomeProductsCar Seats HarnessesHoudini 31 7 Point Harness
HomeProductsCar Seats HarnessesHoudini 31 7 Point Harness
  • Houdini 31
  • Houdini 31
  • Houdini 31
  • Houdini 31
  • Houdini 31
  • Houdini 31
  • Houdini 31

Houdini 31 7-Point Harness

Medifab's most secure vehicle harness - will keep any Houdini's from escaping from their vehicle seat!

Vehicle positioning harness for children and adults with special needs such as Autism Spectrum Disorder (ASD), Attention Deficit Hyperactivity Disorder (ADHD), Down Syndrome, Asperger’s disorder, developmental delay or other challenging behavioural needs where the person has problems with attention and safety. Providing safer travel and management of these loved ones when travelling in the car or other means of transport.

Alternatively, this harness can also be used to offer postural support and assist in seating the occupant in an upright sitting position for persons with physical disabilities such as Cerebral Palsy (CP) and other significant physical disabilities or complex needs where extra support and positioning is required during travel.

The Houdini 31 Harness offers greater support due to a front PVC pad that is attached around the individual's torso with two straps fitted with anti-escape buckles.

Fits most types of vehicle seating including single & double seats. To fit the harness access is required between the seat back and seat cushion.

Please note that this vehicle harness is not classed as safety harness but as a medical device for postural support. To comply with safety regulations, the vehicle safety belt must always be worn over the top of the harness. The combination of the existing vehicle safety belt and the secondary harness offers added security for the passenger. Carries the CE mark and complies with the requirements of MDD 93/42 EEC.

It is advisable to carry out a safety and risk assessment to first consider the problems involved and what the situation would be if the passenger is not wearing a special needs harness. Could they be in danger to themselves and to other passengers in the vehicle or even other drivers on the road if they are not safely seated during travel?

A safety webbing slicer is included with every vehicle harness and must be kept in the vehicle as a safety precaution.



  • Suitable for bench vehicle seats only, or in the case of 'deep-bucket' style single backrest seats 
  • Attaching straps go vertically around the rear of the seat it is installed on 
  • Full 7-point harness with superior torso control and stability (crotch strap between the legs doesn't need to be used if not required) 
  • Access to rear of seat is necessary when installing 
  • Gap required between seat and backrest

Need assistance with comparing vehicle harnesses? View the Houdini Harness Selection Guide


  • Houdini Harness Anti-Escape Buckle

    Read more

    Houdini Harness Anti-Escape Buckle

    Steel anti-escape buckles can be installed to prevent children with inquisitive fingers, challenging behaviour or learning difficulties escaping from the carseat or harness during travel. These unique buckles have proven very successful as they operate in reverse to a normal buckle. 

    To disengage, you raise the spring-loaded catch, and then tension the belt before it will release. (It will not press release)

  • Houdini Harness Pen-Release Buckle Upgrade

    Read more

    Houdini Harness Pen-Release Buckle Upgrade

    Pen/Key release buckle upgrade to harness, with Safety webbing slicer and retractable prodding device for buckle release. 

    Code Model Description
    4604-1305-031 Model 13 Upgrade on 2 waist band buckles and neck strap (total 3 buckles)
    4604-2215-031 Model 22 Upgrade on crotch strap, upper neck strap and 2 waist band buckles (total 4 buckles)
    4604-2222-031 Model 22 Extra fixing strap upgrade for when Model 22 is upgraded
    4604-2805-031 Model 27 or 28 Upgrade on waist belt
    4604-3105-031 Model 31 Upgrade on two waist buckles (total of 2 buckles) and includes release tool.


    4604-1305-031, 4604-2215-031, 4604-2222-031, 4604-2805-031, 4604-3105-031


Code Size Age Group
#4604-3101-017 31A Paediatric
#4604-3102-017 31B 7 years to Adult
For consideration once child is of an appropriate height and weight to progress from a full booster into a half booster, usually around 6 or 7 years of age. If unsure please contact one of our product consultants. 
Washing instructions 
  • Hand wash only - in warm water up to 70/80 degrees.
  • Use mild detergent/anti-bacterial liquid wash.
  • Mild disinfectant can be used. 
  • Do not use bleach
  • Do not tumble dry

12 months


Is this harness vehicle safety approved?

Please note that this vehicle harness is not classed as safety harness but as a medical device for postural support. It must be worn in conjunction with the vehicle safety belt. It is classed as a Disabled Persons Restraints for postural support and as a low risk medical device it carries the CE mark and complies with the requirements of MDD 93/42 EEC.

Does this harness require a vehicle tether point?

No. This harness does not require any tethering; it is not a safety harness. It is simply attached to the vehicle seat with the securing straps.

If I can't pass the strap between the seat and the backrest, what can I do?

This can be common. Most vehicles have a carpet flap at the rear which prevents the straps coming vertically around the seat. In virtually all cases the carpet can be cut with a pair of scissors or a knife to provide access through.

How do I Care for my Harness when it needs washing?

  • Harnesses must be cleaned by Hand washing only, in warm water up to 70 or 80 degrees.
  • Use a mild detergent/anti-bacterial liquid wash. 
  • Mild disinfectant can be used. 
  • Do not use Bleach or Tumble Dry your harness.

Can this system be used when the person is an adult?

Yes - There is an adult sized Houdini harness available.


The Houdini Harness 31B has made such an improvement. 

Not only am I more comfortable due to being properly supported by the harness, I am also able to wear a seat belt properly which also provides a safer ride during transport. I am not able to slouch out of the seat belt into an unsafe position.

The harness has also calmed me down some, and also the buckles has prevented it from opening, and being somewhat more restrained has not bothered me.

I am so happy with the harness and it has really helped with postural support, safety with the seat belt, and helps keep me from getting out of my seat. 

- JM