Donjoy Full Force Knee Brace with Fourcepoint
 Donjoy Full Force Knee Brace with FourcepointDonjoy Full Force Knee Brace with Fourcepoint 
Speak to Our Product Experts for More Advice

Donjoy Full Force Knee Brace with Fourcepoint

  • Powerful and clinically proven solution for protection of the ACL
  • Ideal for active patients, leisure sports or daily living
  • Uses Four-Points-of-Leverage technology for support
  • Mouldable frame provides a custom fit for comfort
Ligament / Leg:  
£337.99(Inc. 20% VAT)
(£281.66 Exc. VAT)

Donjoy Full Force Knee Brace with FourcePoint

Suffering from ACL instability can be detrimental to your activity levels. The Donjoy Full Force Knee Brace with FourcePoint, designed with patented Four-Points-of-Leverage and FourcePoint technology, will protect the ACL even when you're performing intensive activities.

How Does the Donjoy Full Force Knee Brace Work?

The Donjoy Full Force Knee Brace combines Donjoy's proven Four-Points-of-Leverage system with their patented FourcePoint hinge technology, the most powerful and clinically proven solutions available to protect the ACL. Watch the video below to learn more about the amazing technologies behind the Donjoy Full Force Knee Brace with FourcePoint:

Who Is the Donjoy Full Force Knee Brace Suitable For?

The combined use of the Four-Points-of-Leverage system and the FourcePoint hinge technology makes the Donjoy Full Force Knee Brace ideal for protecting the anterior cruciate ligament (ACL) and aiding in recovery from common ACL injuries. Created for all activity levels, the sleek, low profile and exceptionally light weight of the Full Force Brace have made it the go-to prefabricated brace for competitive and recreational athletes of all kinds.

Is the Donjoy Full Force Knee Brace Suitable for Sports?

Yes, one of the main purposes of the Donjoy Full Force Knee Brace is to provide additional stability and support for your knee during sports. It is especially suitable for skiing, as well as basketball, football, tennis and various watersports. If you've suffered from an ACL injury and are trying to get back to your favourite sport, this is the brace for you.

How Do I Size and Fit the Donjoy Full Force Knee Brace?

The Donjoy Armor with FourcePoint Knee Brace is available in six sizes and is suitable for men and women. To find the right size for you, measure around your thigh, knee and calf.

The thigh measurement is taken around the thigh 15 cm (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.

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

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"

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 you choose your size based on your Thigh Circumference measurement.

How Do I Fit the Donjoy Full Force Knee Brace?

Using your Brace is fairly easy and full user instructions are supplied with your purchase. However, an online version can be downloaded below.

User Instructions
Click Here for User Instructions

Should I Choose Short or Standard Length?

There are two length options available for the Full Force Knee Brace. These options are:

  • Short: Includes a shorter calf area that stops further up your calf. This is ideal for those using their brace with ski boots, skates, or other equipment that requires space on the calf and shin.
  • Standard: Includes a standard calf section that goes further down the calf. This may provide a more secure feel, but both length options will provide the same high level of support.

Can I Wear the Donjoy Full Force Knee Brace on Either Leg?

To ensure optimal fit and comfort, the Donjoy Full Force Knee Brace has been designed specifically for the left and the right leg. You can select the option you need from the drop-down menu at the top of the page.

Which Sports Can I Play with the Donjoy Full Force Knee Brace?

Designed to help you remain active during use, the Donjoy Full Force Knee Brace is crafted for those who want to retain their active lifestyle following an injury. The brace can be used for the following sporting activities:

  • Basketball
  • Cycling
  • Football or soccer
  • Golf
  • Handball
  • Motocross
  • Other sporting activity
  • Skiing
  • Tennis
  • Volleyball
  • Watersports

What Is the Four-Points-of-Leverage System?

Donjoy Knee Brace Technology
The Four Points of Leverage are spread out across the brace for better balance

Through the rigid cuff and strap configuration made by the Four Points of Leverage, a posterior force is applied to the tibia to prevent anterior movement. This is clinically-proven to significantly reduce ACL strain and provide a constant dynamic load on the joint for improved stability and support.

What Is FourcePoint Hinge Technology?

The Full Force Knee Brace combines two clinically proven Donjoy technologies in one brilliantly performing brace. Using Four-Points-of-Leverage stabilises the ligament and significantly reduces ACL strain. Donjoy’s FourcePoint hinge dampens knee-joint extension, which increases flexion angles and reduces anterior shear forces on the tibia.

Passive vs. Dynamic Braces

There are two differing approaches to the design of a knee brace: passive and dynamic supports. Passive brace designs don’t actively address instabilities, which allows the knee to move before the brace can take effect and therefore results in a greater chance of injury.

Conversely, Donjoy’s dynamic Four-Points-of-Leverage design continually addresses instabilities at all times, whether you're running, jumping or standing. This prevents injuries while also allowing you to maintain an active lifestyle. Learn more about FourcePoint and other Donjoy Knee Brace technologies by reading our blog!

Standard Polycentric vs. FourcePoint

Most functional braces incorporate standard polycentric hinges that connect the thigh and calf frames through multi-centred pivot points. This attempts to mimic the knee’s natural movements.

On the other hand, Donjoy has taken the hinge design and ACT protection to another level with its patented FourcePoint technology. FourcePoint is the only hinge design that’s clinically proven to protect the ACL by reducing the amount of time spent in the "at-risk" position. That’s confidence every athlete can count on!

Does the Full Force Knee Brace Have Spring Loaded Support?

The Full Force Knee Brace is designed to stabilise the ligament and significantly reduce ACL strain by dampening knee-joint extensions, which increases flexion angles and reduces anterior shear forces on the tibia. It does not, however, feature spring loaded support.

How Do I Care for the Donjoy Full Force Knee Brace?

To maintain good levels of hygiene, we recommend cleaning the Donjoy Full Force Knee Brace regularly. The liners and condyle pads can be hand washed in cool water (30°C/86°F) using mild soap, and air dried. Do not heat dry liners or pads.

Features and Benefits of the Full Force Knee Brace

  • Lightweight and low profile to minimise visual brace appearance
  • Incorporated Donjoy's patented Four-Points-of-Leverage technology
  • Designed with FourcePoint hinge design technology for stability
  • Crafted with an aircraft aluminium grade frame to reduce weight
  • Mouldable frame provides you with a custom fitting for comfort
  • Internally mounted swivelling strap tabs accommodate leg movement
  • Made with a swooping thigh cuff for inner thigh clearance and bilateral use
  • Supplied with one-year warranty on frame and hinges

How Heavy Is the Donjoy Full Force?

The Donjoy Full Force Knee Brace has an approximate weight of 1kg.

Delivery - Free UK Mainland Delivery

This item is usually dispatched via DPD courier and should arrive within 1 - 2 working days. Please note that there may be a slight delay for orders being shipped to Northern Ireland, please contact our customer care team at for more information.

Customer Reviews

Be the first to Write a review !