Donjoy Armor Professional Knee Brace with Fourcepoint

Brand
Donjoy
(25 reviews)
£565.99£338.99+ FREE UK delivery
Includes 20% VATPrice exc. VAT: £282.49

IMPORTANT: Please note that we recommend reading our guide to choosing the right size and our guide to fitting your Donjoy Knee Brace before placing an order.

This item in brief:
  • The ultimate ACL knee brace providing support to the knee joint
  • Ideal knee brace for skiing, high impact and contact sports
  • For severe ACL instabilities, reconstruction and deficiencies
  • Fourcepoint hinge provides added ACL support to improve your gait
Product Details

Donjoy Armor Knee Brace with Fourcepoint

After injury or surgical reconstruction of your ACL, a strong and reliable brace is needed to provide stability and prevent hyperextension. The Donjoy Armor Professional Knee Brace with Fourcepoint is the ultimate ACL knee brace, and is ideal for protecting and providing stability to the knee during skiing, as well as high impact and contact sports.

Please note that the Donjoy Armor Fourcepoint Knee Brace is an intricate brace that can be difficult to fit correctly. Click here to view our fitting instructions.

What's Included?

The Donjoy Armor with Fourcepoint is supplied with everything needed to start receiving the best ACL support right away. It includes:

  • 1 x Donjoy Armor Knee Brace with Fourcepoint
  • 2 x Anti-Migration Condyle Pads
  • 1 x Mesh Carry Bag
  • 1 x Warranty Card

Please note that this is the short version of the Donjoy Armor (as pictured), which measures 6.5" from the centre of the hinge to the bottom of the brace. This is the most popular option in the UK and is specifically designed so that the bottom of the knee brace is short enough on the calf not to get in the way of ski boots and motorcycle boots. It is also suitable for use with all other types of footwear.

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

Sizing Information for the Fourcepoint Knee Brace

The Donjoy Armor Fourcepoint Knee Brace is available in seven sizes and is suitable for men and women. To determine which size is right for you, simply measure the circumference of your thigh, knee and calf as demonstrated in the image below before referring to the sizing table beneath.

How to measure yourself correctly for a knee brace

Size Thigh Circ. Knee Circ. Calf Circ.
Extra Small 33 - 39cm 30.5 - 33cm 25.5 - 30cm
Small 39 - 47cm 33 - 35.5cm 30.5 - 35.5cm
Medium 47 - 53.cm 35.5 - 38cm 35 - 40.5cm
Large 53 - 59.5cm 38 - 43cm 40.5 - 47cm
Extra Large 59.5 - 67cm 43 - 48cm 47 - 50cm
XX-Large 67 - 75cm 48 - 53cm 50 - 56cm
XXX-Large 75 - 81cm 53 - 58.5cm 56 - 61cm

What If My Measurements Fall Under Different Sizes?

If your measurements fall under different sizes (for example: Medium for Thigh Circumference and Large for Knee Centre), we recommend going with the larger size.

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 Do I Fit my Donjoy Armor Support?

For fitting instructions, please view our simple step-by-step guide to fitting, or view the easy-to-follow video by clicking the link below:

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.

Which Sports Is This Knee Support Designed For?

The Donjoy Fourcepoint Knee Brace is designed to provide maximum protection to the knee for high impact and contact sports. Among others, this knee brace is suitable for:

  • Baseball and softball
  • Extreme and contact sports
  • Football
  • Hockey
  • Motocross
  • Skiing and snowboarding
  • Volleyball
  • Watersports (including salt water)

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

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 injury brace doesn't interfere with either a ski or motocross boot and remains clear from the top of your boot.

This makes the support more versatile, allowing it to be used without restriction across a number of sports.

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 and knee support with a Four Points of Leverage design

Key Features and Benefits

  • The ultimate knee support for supporting and protecting the ACL
  • Provides support with an enhanced "Four Points of Leverage" system
  • Resistance threshold is adjustable based on your stage of recovery
  • Ideal for providing support during recovery from knee injury
  • 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
  • Includes a 1 year warranty on frame and hinge
  • Includes a 6 month warranty on soft goods

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 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.

Are Comfort Liners Available?

While the Donjoy Armor is anatomically designed for maximum comfort, intense activity may cause it to catch the skin at certain areas. To avoid this, a Donjoy Armor Black Lycra Undergarment is available to protect the skin and make wearing your brace more comfortable. This liner can be added to your order using the drop-down menu near the top of the page.

How Can I Cushion the Brace for Contact Sports?

Since the Donjoy Armor with Fourcepoint is made with aircraft-grade aluminium, we recommend covering it to avoid injuries to your opponents. For the purpose we would recommend the Donjoy Armor Sports Cover, which is a padded cover designed to cushion your brace without affecting use. You can add it to your order using the drop-down menu near the top of the page.

Can I Wear the Donjoy Armor Over My Clothes?

Donjoy do not advise you wear your knee brace over your clothes, as the support provided by the hinges on either side of the knee joint will be compromised. The Donjoy Armor is designed to always be worn underneath clothes to achieve the incredible level of support the brace provides.

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 injuries, as this brace is only designed for ACL injuries. The Fourcepoint hinge provides resistance 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, click here to watch our Donjoy Armor demonstration video!

Delivery Information

Delivery - Free UK Mainland Delivery

This item is usually dispatched via 24hr courier.

Delivery is free of charge on all items at Health and Care when delivered to a mainland UK address. Orders are often dispatched the same day 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.

More Info

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:

Reviews (25)
Write a review and share your opinions!
25 reviews:

ACL Brace
Rating:
14 September 2023  | 

Firstly great price compared to others and I had mine delivered next day which was fantastic. Takes a while to get used to, but I have played a couple of football games now and it has proved its weight in gold. Friends have even said "your moving and turning a lot quicker". Basically I have torn my left ACL and the consultant highly recommended a decent brace to prevent any further damage as he was amazed I hadn't already. Mind says one thing and the body says another... I would highly recommend this DonJoy brace, yes its not cheap but definitely does what it is supposed to. My only issue is the instructions that you get. Not great but you can find more on line. Hope this helps...

 
Was this helpful to you?  Yes  /  No

helps with the acl but fit isnt 100% for me
Rating:
08 June 2021  | 

I'm different sizes in the 3 dimensions so cant be helped unfortunately but is still perfectly wearable.

Its only minor but really annoying, the covers for the condyle pads regularly get stuck to the velcro and come off!

 
Was this helpful to you?  Yes  /  No

skiing
Rating:
18 December 2019  | 

have recently used the brace for a week in the Alps & although took it easy to start with was skiing most things on & off piste by the end. big improvement as last time was occasionally hyperextending & falling over.

1 of 1 people found this review helpful.
Was this helpful to you?  Yes  /  No

A relief
Rating:
16 December 2019  | 

I was worried after tearing my ACL last year that I wouldn’t be able to ski; wearing the brace I am confident, and according to my friends, skiing as I normally do. It is a bit bulky under salopettes, and a bit uncomfortable without the ‘undergarment’ sleeve, but worth it. I love skiing!!

 
Was this helpful to you?  Yes  /  No

Donjoy Armor Professional Knee Brace
Rating:
17 April 2019  | 

First class service

 
Was this helpful to you?  Yes  /  No

Donjoy Kneebrace
Rating:
22 February 2019  | 

I snapped my acl 20 years ago and had an operation to mend torn cartilage six months ago. This brace has revolutionised my ability to ski aggressively again. You barely know it’s on but it totally stops any hyperextending of the knee and allows me to ski moguls and powder again.

 
Was this helpful to you?  Yes  /  No

Question to previous customers
Rating:
24 May 2018  | 

I want to buy the Donjoy Armor but dont know if its short calf or standard calf. If anyone sees this comment can you kindly help me. Thanks

4 of 4 people found this review helpful.
Was this helpful to you?  Yes  /  No

Response:

Hi Ian,

Thanks for leaving your question with us. I can confirm that the Donjoy Armor Professional Knee Brace with Fourcepoint features a short calf. Thanks again for getting into contact.

Best wishes,

Alex at Health and Care


Great knee brace for skiing
Rating:
18 February 2018  | 

Had one of these for my right knee for 8 years and it’s been great for skiing. Final had to get one for my left knee. Fit is spot on. Service was great. Could have done with sending an email out saying it was coming but arrived in the 24 - 48 hours as promised. Looking forward to skiing next week.

3 of 3 people found this review helpful.
Was this helpful to you?  Yes  /  No

Great Brace
Rating:
26 January 2018  | 

I have completely torn my ACL in my right knee and was unable to walk without my knee giving way, I purchased this Donjoy Armor Knee Brace and can now walk freely without hyperextension and get back to the Gym to build muscle around my knee to help support it. Would highly recommend this knee brace. Fast next day delivery as well.

6 of 7 people found this review helpful.
Was this helpful to you?  Yes  /  No

everything was fine
Rating:
30 November 2017  | 

Nice contact, fast delivery with tracking number, I would buy again.

3 of 4 people found this review helpful.
Was this helpful to you?  Yes  /  No

Read all 25 reviews...

Write a review and share your opinions!
25 reviews:

ACL Brace
Rating:
14 September 2023  | 

Firstly great price compared to others and I had mine delivered next day which was fantastic. Takes a while to get used to, but I have played a couple of football games now and it has proved its weight in gold. Friends have even said "your moving and turning a lot quicker". Basically I have torn my left ACL and the consultant highly recommended a decent brace to prevent any further damage as he was amazed I hadn't already. Mind says one thing and the body says another... I would highly recommend this DonJoy brace, yes its not cheap but definitely does what it is supposed to. My only issue is the instructions that you get. Not great but you can find more on line. Hope this helps...

 
Was this helpful to you?  Yes  /  No

helps with the acl but fit isnt 100% for me
Rating:
08 June 2021  | 

I'm different sizes in the 3 dimensions so cant be helped unfortunately but is still perfectly wearable.

Its only minor but really annoying, the covers for the condyle pads regularly get stuck to the velcro and come off!

 
Was this helpful to you?  Yes  /  No

skiing
Rating:
18 December 2019  | 

have recently used the brace for a week in the Alps & although took it easy to start with was skiing most things on & off piste by the end. big improvement as last time was occasionally hyperextending & falling over.

1 of 1 people found this review helpful.
Was this helpful to you?  Yes  /  No

A relief
Rating:
16 December 2019  | 

I was worried after tearing my ACL last year that I wouldn’t be able to ski; wearing the brace I am confident, and according to my friends, skiing as I normally do. It is a bit bulky under salopettes, and a bit uncomfortable without the ‘undergarment’ sleeve, but worth it. I love skiing!!

 
Was this helpful to you?  Yes  /  No

Donjoy Armor Professional Knee Brace
Rating:
17 April 2019  | 

First class service

 
Was this helpful to you?  Yes  /  No

Donjoy Kneebrace
Rating:
22 February 2019  | 

I snapped my acl 20 years ago and had an operation to mend torn cartilage six months ago. This brace has revolutionised my ability to ski aggressively again. You barely know it’s on but it totally stops any hyperextending of the knee and allows me to ski moguls and powder again.

 
Was this helpful to you?  Yes  /  No

Question to previous customers
Rating:
24 May 2018  | 

I want to buy the Donjoy Armor but dont know if its short calf or standard calf. If anyone sees this comment can you kindly help me. Thanks

4 of 4 people found this review helpful.
Was this helpful to you?  Yes  /  No

Response:

Hi Ian,

Thanks for leaving your question with us. I can confirm that the Donjoy Armor Professional Knee Brace with Fourcepoint features a short calf. Thanks again for getting into contact.

Best wishes,

Alex at Health and Care


Great knee brace for skiing
Rating:
18 February 2018  | 

Had one of these for my right knee for 8 years and it’s been great for skiing. Final had to get one for my left knee. Fit is spot on. Service was great. Could have done with sending an email out saying it was coming but arrived in the 24 - 48 hours as promised. Looking forward to skiing next week.

3 of 3 people found this review helpful.
Was this helpful to you?  Yes  /  No

Great Brace
Rating:
26 January 2018  | 

I have completely torn my ACL in my right knee and was unable to walk without my knee giving way, I purchased this Donjoy Armor Knee Brace and can now walk freely without hyperextension and get back to the Gym to build muscle around my knee to help support it. Would highly recommend this knee brace. Fast next day delivery as well.

6 of 7 people found this review helpful.
Was this helpful to you?  Yes  /  No

everything was fine
Rating:
30 November 2017  | 

Nice contact, fast delivery with tracking number, I would buy again.

3 of 4 people found this review helpful.
Was this helpful to you?  Yes  /  No

Read all 25 reviews...

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