Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer!
Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer!Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer!Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer!Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer!
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Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer!

  • Best ACL knee brace with a FREE undergarment and knee ice pack
  • Full kit for knee protection during sports and recovery after injury
  • For severe ACL instabilities, reconstruction and deficiencies
  • Fourcepoint hinge provides added ACL support to improve your gait


In stock now  

In stock now

£498.99(Inc. 20% VAT)List Price:  £513.93
(£415.83 Exc. VAT)

Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer!

When getting back into sports after an ACL injury, you'll need robust support, but you need to make sure you stay comfortable for maximum performance, and have all the gear you need to recovery afterwards. The Donjoy Armor Professional Knee Brace with Fourcepoint - FREE Gifts Offer includes the ultimate ACL knee brace, along with an undergarment to keep your skin protected and chafe-free, as well as a specially designed ice pack wrap to ensure you minimise swelling and keep your recovery on track.

What's Included in this Donjoy Armor Special Offer?

This pack includes everything you need to protect your knee and aid your recovery. It includes:

What's Special About This Free Offer?

This knee brace offer is completely unprecedented, as we're offering the best ACL knee brace at our regular low price – and adding in two great accessories completely FREE as well! In this pack you'll get the top-of-the-range Donjoy Armor Knee Brace with Fourcepoint, as well as the Black Lycra Undergarment to keep you comfortable, and the Dura Soft Knee Sleeve Ice Pack Wrap to provide effective cryotherapy to your knee. This lets you stay protected from injury, keep your skin comfortable during activity, and reduce swelling and aid recovery afterwards! 

What's the Donjoy Armor Designed For?

The Donjoy Armor is the best brace to use for active people suffering from ACL instability or injury. This ACL knee support is particularly suited to treatment and protection of:

  • Moderate to severe ACL instability
  • Recovery from ACL reconstruction and surgery
  • MCL or LCL instability
  • Meniscus injury
  • Hyperextension prevention

How Does the Donjoy Armor with Fourcepoint Support the ACL?

The strongest and most supportive ACL brace around, the Donjoy Armor with Fourcepoint is a hinged knee brace using the Donjoy Fourcepoint hinge technology. The spring-loaded Fourcepoint hinges keep the hamstring in constant tension, and takes pressure off the ACL using a "Four Points of Leverage" system. As the hamstring is attached to the tibia (or shin bone), the hamstring tension pulls the tibia back keeping it stable and almost entirely eliminating the chance of an ACL injury.

How Much Does the Black Lycra Undergarment Improve Comfort?

Since the Donjoy Armor is built for strong ACL support during intense activity, chafing and irritation can be common. With the Black Lycra Undergarment, your skin is protected while the brace's fit is improved, allowing you to stay comfortable to maximise your performance and enjoyment.

How Is the Dura Soft Knee Ice Pack Wrap Used?

The Dura Soft Knee Ice Pack is designed to make icing your knee as convenient and comfortable as possible. To ensure swelling is minimised and your recovery stays on course, simply freeze the ice pack inserts and insert them into the wrap. Then, use the elasticated straps to fix the wrap around your knee to enjoy full coverage and the most effective cryotherapy!

How Does the Fourcepoint Hinge Improve ACL Support?

While the Donjoy Armor is available without Fourcepoint technology, it's the Fourcepoint hinge that really puts this brace at the top of the class in terms of ACL support. The brace works by limiting the time your knee is in an "at risk" position, increasing the posterior load applied by the brace on the tibia when you reach a certain level of knee flexion. This dampens knee extension and reduces shear forces on the knee, all while improving your natural gait by applying increasing resistance until you reach a firm point during your natural movement.

The Fourcepoint hinge limits the time your knee is in an "at risk" position

Sizing Information

The Donjoy Armor with Fourcepoint Knee Brace is available in seven sizes and is suitable for men and women. To determine which size is right for you, you must measure the circumference of your thigh, knee and calf, and then refer to the table below.

The thigh measurement is taken around the thigh 15cm (6") above the knee cap. The knee centre measurement is taken directly around the centre of the knee cap. The calf measurement is taken around the calf 15cm (6") below the knee cap.

Size Thigh Circumference (cm/inches) Knee Centre Circumference (cm/inches) Calf Circumference (cm/inches)
Extra Small

33 - 39cm

13 - 15.5"

30 - 33cm

12 - 13"

25 - 30cm

10 - 12"


39 - 47cm

15.5 - 18.5"

33 - 35cm

13 - 14"

30 - 35cm

12 - 14"


47 - 53cm

18.5 - 21"

35 - 38cm

14 - 15"

35 - 40cm

14 - 16"


53 - 60cm

21 - 23.5"

38 - 43cm

15 - 17"

40 - 45cm

16 - 18"

Extra Large

60 - 67cm

23.5 - 26.5"

43 - 48cm

17 - 19"

45 - 50cm

18 - 20"


67 - 75cm

26.5 - 29.5"

48 - 53cm

19 - 21"

50 - 55cm

20 - 22"


75 - 83cm

29.5 - 32"

53 - 58cm

21 - 23"

55 - 60cm

22 - 24"

What If I Need More Help with Sizing My Brace?

For extra information and directions on how to size and apply your knee brace, read our sizing guide blog.

How Durable Is the Donjoy Armor?

Constructed from light aircraft grade aluminium, the Donjoy Armour with Fourcepoint Knee Brace is exceptionally strong and lightweight and enables you to continue with any sporting activity. As this is the standard short calf version, the knee brace doesn't interfere with either a ski or motocross boot and remains clear from the top of your boot.

What Is the Four Points of Leverage System?

As is mentioned above, the Donjoy Armor uses a "Four Points of Leverage System" to increase the posterior load on your tibia, thereby reducing the load on your ACL. These leverage points are labelled in the diagram below.

The Donjoy Armor Brace provides ACL relief with a Four Points of Leverage design

Can the Fourcepoint Hinge Be Adjusted?

Yes, the Fourcepoint Hinge allows you to set your flexion levels based on your stage of recovery. This adjustment changes the angle where the Fourcepoint's tension stops, allowing you to choose between 25°, 35° (default setting), 45°, 55° or 65°. This allows you to choose the perfect level of movement for you, and lets you add progressively more range of motion as you recover. The level you choose should be based on your doctor's advice and your own personal comfort.

Will the Donjoy Armor Fit Into Ski Boots?

Yes, this is the short calf version of the Donjoy Armor, meaning the calf portion is shortened to allow it to fit into ski boots, snowboard boots, skates, and other specialist footwear that requires space on the calf. Designed primarily for skiing and high-impact sports, the Donjoy Armor is definitely the best Donjoy knee brace for skiing.

Will This Knee Brace Stay Put?

To ensure it's always providing support to your ACL, this knee brace is designed to stay put no matter your level of activity. It does this with the anti-migration supra condyle pads, each of which holds your knee in place in the centre of the brace to ensure it doesn't slip. The images below show the inside of the brace with, and then without, the condyle pads fitted.

Donjoy armor brace with condyle pad attachedDonjoy armor brace without condyle pad attached

Are Spare Parts Available?

Yes, spare pads are available if the initial pads supplied with your Donjoy Armor Knee Brace begin to wear away. You can purchase these separately as the Pack of 5 Knee Pads for Donjoy Armor Professional Knee Brace with Fourcepoint.

Is This Knee Brace Heavy?

While incredibly strong, this knee brace remains light enough to avoid hindering athletic performance or weighing you down. Weighing in at just 612g (1.35lbs) the Donjoy Fourcepoint Knee Brace is made with 6061 T6 aircraft aluminium, meaning it provides maximum strength with minimal weight.

Why Does the Donjoy Armor Offer Adjustable Tension?

The Donjoy Armor is designed to react during leg extension and offer an increasing resistance in the last 35° of extension at factory setting. It does this in order to reduce extension shock and increase posterior tibial loads, thereby reducing the strain placed on your ACL.

How Long After Surgery Can I Wear the Donjoy Armor Brace?

Unfortunately, everyone's recovery and condition is different, so there's no concrete time frame as to when you should start wearing the Donjoy Armor Brace. We would recommend that you consult your doctor, and come up with a plan that includes the introduction of your Donjoy Armor Knee Brace at a certain point in your recovery.

Is the Donjoy Armor with Fourcepoint Suitable for Salt Water Sports?

Yes, the Donjoy Armor is an excellent option for ACL support during water sports such as wakeboarding and water skiing. If you intend to use your Donjoy Armor in salt water, we would recommend rinsing it with clean water after each use to maximise longevity.

Is this Brace Suitable for PCL Injuries?

No, this brace is NOT suitable for PCL lesions and injures, as this brace is only designed for ACL injuries. The Fourcepoint hinge provides resistant that will increase force on the PCL, making it entirely unsuitable for recovery from PCL injuries. If you have a PCL injury or have a combination of knee injuries or problems and require a combined instability knee brace (CI), please see the Donjoy Armor Professional Knee Brace without Fourcepoint.

See For Yourself!

For a quick overview of the Donjoy Armor Knee Brace and to see it in action for yourself, take a look at the short video below.

Key Features

  • The ultimate ACL knee brace combined with two FREE gifts!
  • Provides support with an enhanced "Four Points of Leverage" system
  • Resistance threshold is adjustable based on your stage of recovery
  • Gradual soft stop the extension for comfortable movement
  • Helps prevent hyperextension of the knee
  • Suitable for both men and women
  • Short calf design to fit into ski boots and skates
  • Made with a mouldable, medial swooping frame for custom fit

Do you have a question about this product or want to purchase it? No problem at all. Simply call us on 020 7720 2266 between 09:00 and 17:00 Monday to Friday. 

You can also email us with your question by using the form below. A member of our helpful Customer Care Team will respond to your enquiry personally as soon as they can.

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To find out more information about the Donjoy Armor Professional Knee Brace with Fourcepoint or injuries that the support can help with, check out the following links:

Delivery - Free UK Mainland Delivery

This item is usually dispatched by 24 hour courier.

This item is usually dispatched the same day for next working day delivery when ordered before 2.00pm, Monday to Friday.

Please call our Health and Care Customer Care Team on 020 7720 2266 if you have any questions about the delivery of this item.

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