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Donjoy Armor With Fourcepoint Knee Brace

Donjoy High Level Ligament Knee Support
Code: DJ99
  • £499.00
  • (FREE UK Delivery)
Order within for delivery on Tuesday 22nd, August
(when you select a Next Day service).
Item in Stock | Usually dispatched within 24 hours

- 4 Points of leverage
- Visit fitting centre for help
- Ideal for ACL or PCL Injury
- Will fit with ski boots

What is the Donjoy Armor Hinged Knee Brace?

The Donjoy Armor Hinged Knee Brace is one of the most high level and supportive knee braces on the market. It is provides un-paralleled support to the cruciate ligaments in the knee. The Donjoy Armor forms a lightweight exoskeletal frame for the knee made from  aircraft grade aluminium, which follow the contours of the calf and thigh. 

One of the best features of the brace is; Donjoy’s unique Fourcepoint hinges, located either side of the knee. Unlike the conventional offloading gear hinge which connects the thigh and calf through a series of geared pivot points providing a stabilising force, whilst mimicking the knees movement. The Fourcepoint hinge is different, knees are most vulnerable to injury during the later stages of extension (straightening your leg) the Forcepoint hinge uses a spring mechanism to apply a gradually increasing resistance during extension, this dampens the movement preventing any sudden jerks on the joint, the best comparison is to a soft closing draw in the kitchen the mechanism takes effect just in time to stop the draw slamming or in this case the knee becoming injured. You are also able to adjust the resistance level between 5 settings depending on your injury and activity level.

Donjoy apply their four points of leverage theory to the Armor to provide a constant force to the tibia, which reduces the instability in the ACL by removing load from the knee and dispersing it between the thigh and calf muscles. The four points are as follows:

  • 1 - The anterior thigh cuff anchors the femur at the top of the anterior thigh.
  • 2 - The posterior calf cuff anchors the tibia at the bottom of the posterior calf.
  • 3 - The posterior thigh strap across the back of the lower thigh acts to push the femur forwards.
  • 4 - The anterior calf strap provides the essential opposing force creating a constant active load on the tibia, preventing anterior tibial translation.

When to wear a Donjoy Armor knee brace?

Wearing a Donjoy Armor, will prevent all unnatural movement in the knee, whilst retaining a full range of natural movement. This means that it is suitable to wear for a large range of purposes, from day to day wear, to taking part in sports at a high level. It can be worn to stop unstable knees from hyper extending, twisting, or bowing (both laterally and / or medially). 

The Donjoy Armor is extremely popular for use in snow sports such as skiing and snowboarding where ACL tears and ruptures are very common, other sports include motocross racing, walking, running and climbing. The only time the Armor will not be suitable is for contact sports due to the solid nature of the metal frame and the risk of injury to other players.

To find out more about ACL Injuries, see our blog - ACL Injuries

Features and Benefits of the Donjoy Armor Hinged Knee Brace

  • Four-Points-of-Leverage
  • Adjustable resistance of 25-0, 35-10 and 45-20 degrees
  • FourcePoint technology
  • Flexion-extension control
  • 7 Sizes
  • Contoured frame for a great fit
  • 6061 T6 aircraft aluminium frame
  • 1 year warranty on the frame and hinges
  • 6 months warranty on soft goods
  • Standard anti-migration Supra Condylar Pad
  • Silver Vein coloured frame

How do I choose my size?

Please call 01522 875252 to book an appointment at our Lincoln, so we can make sure the brace fits correctly. Firstaid4sport are the leading authorised fitter for this product in the UK. Fitting is free, there is no obligation to buy, and we have a large range of braces in stock for you to try (we won’t just recommend the most expensive). You can see more information on our fitting centre here - Donjoy Fitting Centre.

If you are unable to attend for a fitting we have made a comprehensive video to help you measure and fit an Armor at home - How to fit a Donjoy Armor

Bend the knees to 90 degrees either in a squatting position, or sat down so you can see down your shin; then measure around your thigh 6 up from the middle point of your kneecap. The circumference around the thigh at this point corresponds to the sizes below; 

Size ChartThigh (cms)Thigh (inches)
X Small33-3913-15.5
X Large60-6723.5-26.5
XX Large67-7526.5-29.5
XXX Large75-82.529.5-32

Please note that the additional condyle pads are not included as standard – we aim to ensure they are included free of charge, however if your brace is sent directly from the manufacturer via direct ship item or international shipments we cannot always ensure they are included. If you specifically require them added then please contact before ordering us to check.

Showing our 3 Donjoy Armor With Fourcepoint Knee Brace reviews with an average rating of Excellent. Would you like to write a review?
Review Summary - 5 out of 5 based on 3 ratings.
  • Overall Rating
  • Review Date - 26th June 2017
  • Pros - Amazing fit and support
  • Cons - Wish Firstaid4sport was national

Snapper my ACL skiing and had reconstructive surgery 3 months later. Needed something to help me get through rehab and back on the slopes. Travelled up from Oxford to Lincoln to see Firstaid4sport. The team were amazing and fitted me with a Donjoy Armor. They needed to adjust and alter lots of straps and the pads on the sides of the knee. There is no way I would have managed this myself as the fit was transformed. It looks very big and bulky to start with and it feels really weird when you wear it at first, however it soon becomes a part of your kit.
I am now back skiing and have so much confidence in the Armor. I do however follow the advice Michael gave me and always ask for my binding to be turned down so my skis fall off a little bit easier! Thanks again to everyone at Firstaid4sport.

June 26, 2017 |

  • Overall Rating
  • Review Date - 19th June 2017
  • Pros - So strong you can really put your confidence into it
  • Cons - can be a bit cumbersome but needs must

What a brilliant product. a few years ago I had undergone surgery for a knee replacement and spent a long time recovering from it. My other knee then suffered over time and i needed a replacement in the other one. I deemed to push it forward as much as possible and my doctor reccomended I buy a knee support, and after going to see the guys at Firstaid4sport, they fitted me into an armor, and i haven't looked back since. Not yet had any surgery on that knee, and still do everything to the best of my ability whilst wearing it. gives me the confidence I need. worth it 100%

June 19, 2017 |

  • Overall Rating
  • Review Date - 16th May 2017

Brilliant customer service with superb personal touch.
Had fitting for donjoy armour brace,well worth the visit to their office. Their knowledge and technical advice enabled me to select the right knee brace for skiing.
Highly recommended to anyone who is recovering from ACL INJURY and wants to get back on the slopes.
Thank you!

May 16, 2017 |

At Firstaid4sport, we aim to provide an effective delivery service using a number of delivery options available to our customers which can be found and determined within the online ordering process.

Standard Delivery

For our standard delivery service, we use Royal Mail and Courier delivery services. Standard delivery usually takes up to 5 working days from despatch date. Postage and packaging costs are dependable on the weight of the product(s). Please note that standard delivery may take longer than stated if circumstances beyond our control disrupt postal services. Standard delivery does not include Special Goods or Dangerous Goods delivery methods (see Delivery Policy below for more details).


Next Working Day Delivery

If you would like to receive your goods sooner, customers can opt for our next working day delivery service. We also offer a next day delivery service to arrive before 12pm the next day.

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Please note that your order must be placed before 3pm to be despatched on the same day.

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Saturday Delivery

If you order on a Friday before 2:59pm (excluding bank holidays) you are eligible for Saturday delivery.

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Our Delivery Policy


All goods quoted for delivery shall be delivered to the address instructed by the customer. The cost of goods delivered will be charged to the customer as defined in the details of delivery charges on the website. Although guidelines have been provided, specific times and dates for delivery cannot be guaranteed. The company shall not be liable for any loss whatsoever caused by non-delivery or delay in delivery. Firstaid4sport require a 14 working days waiting period before being able to trace, replace or refund lost items.

Dispatching your goods

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Next working day delivery with no signature

Choosing the option for next working day with no signature required does waiver the customers rights to claim for a missing or delayed parcel if logged with the couriers as delivered. Firstaid4sport cannot claim for these parcels and therefore if they go missing or are delayed, Firstaid4sport will not be able to provide replacement goods or a refund.

Special Goods, Dangerous Goods and Aerosols

Please note that the Civil Aviation Authority place restrictions on the number of aerosols that can be sent and the services that we use to send these. Aerosols cannot be dispatched by air so regrettably we are unable to deliver these products to Northern Ireland, Jersey, Guernsey, Isle of Man and Ireland.

If your basket contains an aerosol, your order will be sent by a special courier at an additional cost.

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