Donjoy Full Force Knee Brace with Fourcepoint
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Donjoy Full Force Knee Brace with Fourcepoint

Ligament / Leg:  
£415.95   (£346.63 Exc. VAT)  
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  • Designed for ACL injuries
  • Combine Donjoy's 4-Points-of-Leverage-System with FourcePoint Hinge
  • Suitable for all activity levels
  • Low profile and loghtweight

Brand:  Donjoy

Donjoy FullForce Knee Brace with Fourcepoint

The Donjoy FullForce Knee Brace with Fourcepoint has been designed to protect the ACL combining Donjoy’s proven 4-Points-of-Leverage System with Donjoy's patented FourcePoint hinge technology. These two combinations in the Donjoy FullForce Knee Brace with Fourcepoint provide the most powerful and clinically-proven solutions available to protect the ACL.

Created for all activity levels, the Donjoy FullForce Knee Brace with Fourcepoint has a sleek, low profile and exceptionally light weight design.  This Donjoy Knee Brace is suitable for competitive and recreational athletes of all kinds.

Features of the FullForce Knee Brace with Fourcepoint

  • Clinically-proven 4-Points-of-Leverage System
  • Clinically-proven FourcePoint hinge technology
  • Backed by Donjoy’s Knee Guarantee* program, an industry first for prefabricated bracing
  • Internally mounted swiveling strap tabs help accommodate leg movement
  • Swooping thigh cuff for inner thigh clearance and bilateral brace use
  • Strong, lightweight aircraft grade aluminum frame
  • ACL and CI strap configurations
  • Multiple sizes and length

Which Size Is Right For Me?

*The measurement is taken using the thigh circumference 15 cm / 6 inches above the knee cap.

For full details on how to size and apply your knee brace, check out our blog.


 Size in cms*     Size in inches*


 33-39  13-15,5


 39-47  15,5-18,5


 47-53  18,5-21


 53-60  21-23,5


 60-67  23,5-26,5


 67-75  26,5-29,5


 75-81  29,5-32


The Donjoy Difference

The FULLFORCE design combines two clinically-proven DonJoy technologies in one brilliantly performing brace. Our 4-Points-of-Leverage System provides ligament stability 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. The result – less strain on the ACL and a considerable decrease in the chance of injury. Together, these two technologies add up to ironclad confidence.

Brace Technology


There are two differing approaches to brace design – passive and dynamic. Passive brace designs don’t actively address instabilities, which allows the knee to move, or translate, before the brace takes effect – resulting in a greater chance of injury. Donjoy’s dynamic design, 4-Points-of-Leverage System, continually addresses instabilities at all times, whether a patient is running, jumping, or standing.


DonJoy pioneered dynamic bracing with the 4-Points-of-Leverage System, a unique cuff and strapping configuration that provides a net differential posterior force to the tibia, preventing anterior movement. The center of the hinge is just posterior to the midline and just superior to the joint line. This allows points 1 and 3 to compress soft tissue, isolating the femur and bringing it forward. Points 2 and 4 draw the tibia posterior, generating a net differential force, or constant load, directly over the tibia, preventing it from moving forward. The result is significantly reduced strain on the ACL.

Click here for more information about Fourcepoint and our 4 Points of Leverage Donjoy Braces,

Standard Polycentric VS Fourcepoint

Most functional braces incorporate standard polycentric hinges that connect the thigh and calf frames through multi-centered pivot points. They provide a stabilizing force to the brace while attempting to mimic the knee’s natural movements.


Donjoy has taken hinge design and ACL protection to another level with its patented FourcePoint technology. FourcePoint is the only hinge design that’s clinically proven to protect the ACL.2 It enhances Donjoy’s 4-Points-of-Leverage System by dampening knee-joint extension and improving the overall mechanical performance of the brace, increasing flexion angles (5°)2 while simultaneously reducing shear forces (9%-13%) 3 at the knee. The FourcePoint hinge utilizes a leaf spring mechanism that gradually applies adjustable resistance (0, 1, 2, 4, and 6 lbs.) that engages in the last 25° of extension, reducing time spent in the “at-risk” position (flexion angles < 60°).4 As for prophylactic benefits, a recent clinical study shows athletes who trained wearing a DonJoy 4-Points-of-Leverage brace equipped with a FourcePoint hinge were estimated to decrease their chance of non-contact ACL injury by over 50%.5 That’s confidence every athlete can count on.

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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