Short Description
Donjoy's FullForce knee brace provides clinically-proven ACL ligament protection for competitive and recreational athletes; Lightweight, sleek design.
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The Donjoy FullForce Ligament Knee Brace is designed to protect the ligaments of the knee, especially the ACL, from injury. The Fullforce brace combines Donjoy's proven 4-Points-of-Leverage System with patented FourcePoint hinge technology, the most powerful and clinically-proven solution available to protect the ACL. The Donjoy FullForce has a sleek, low profile and exceptionally light weight design that makes it a great go-to prefabricated brace for competitive and recreational athletes involved in all kinds of activities. The unique swooping thigh frame offers a great fit and internally mounted swiveling strap tabs help accommodate leg movement.
This knee brace is designed to provide complete protection of the knee for competitive athletes who are at the highest risk for injuring their ACL. It's best suited for baseball, cycling, football, hockey, lacrosse, running, walking, hiking, and fitness.
Donjoy FullForce Knee Brace Features:
- Backed by DonJoy's Knee Guarantee Program™, an industry first for prefabricated bracing
- 1-year warranty on frame and hinges
- Clinically proven 4 Points of Leverage System pioneered by DonJoy
- LoPro FourcePoint hinges reduce strain on the ACL
- The only bracing technology clinically-proven to protect the ACL
- Swooping thigh cuff for inner thigh clearance and bilateral brace use
- Strong aircraft grade aluminum frame (0.08 - 0.125" thick)
- Carbon coat finish is applied over the aluminum frame for added durability
- Version: Available in standard ACL and combined instability (CI) models. The combined instability version is the same brace design with one additional strap going across the front of the thigh - also helps keep the brace in place better (can also be used for ACL or ACL + additional ligament injuries)
- Length: choose Standard Calf (16" brace length) or Short Calf (14" brace length - best for individuals 5'7" and shorter, for motocross use, or for skiing with tall ski boots)
- Seven sizes - See Size & Fit tab for sizing chart and measurement/fit help
Recommended Manufacturer HCPC: L1845
How To Fit Your Fullforce 4-Point Knee Brace:
The Donjoy FullForce Knee Brace may be used to treat:
- Mild to moderate knee instabilities
- ACL reconstructions
- ACL deficiencies
- Contact and non-contact sports protection
Sizing Chart:
Watch our Measurement/Fitting video and then use a fabric tape measure at the 6-inch mark as shown to measure the circumference of your thigh, center of your knee, and calf for the correct size.
*Available in a Standard brace length or a Short calf. The Short calf is recommended for individuals 5'6" and shorter or anyone using the product with very tall ski boots that might run the risk of interfering with the calf portion of the frame.
Customers reviews and questions

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- performance
- brace
- replacement parts
- experience
- ligament damage
- Staff
- pain
- daughter
- doctor
- high school soccer
From start to finish this was an incredible experience. The Staff helped me get what I needed in a timely manner. My son reports that the braces were perfectly fitting, and he feels that they do not hinder his performance.

Full Fource knee braces
Product as ordered. Shipped and received in timely manner. 2 XXL braces Fit is as recommended from chart.
Great knee brace
Exactly what I was looking for with great support

Excellent replacement
Thanks to the help on sizing via chat/email, the brace fits perfectly. Thank you.

Fullforce for daughter
My daughter is returning to playing high school soccer after tearing her ACL last year. Her doctor recommended she wear this brace for this season to protect her knee. She says it's lightweight and stays up on her leg when she's running. Recommended.

better than the carbon customs
I've had several carbon custom braces, mostly CTI, and this brace is my preferred brace. I actually use these braces until they're destroyed and they protect my knees. The more flexible aluminum frame is more comfortable and adapts to changing muscle/leg size. The strap at the top of the calf wraps all around and adjusts from the front and back so you get the best position of the hinge and it also prevents the brace from slipping down. Then I fine tune the ACL protection engagement with the strap just over the knee and can get it just right. For riskier sports I do set the spring in the hinge to engage at full extension as well. After 3 torn ACLs and then getting these braces I've not had any issues despite lots of kiteboarding and snowboarding.
DME-Direct
Hi Chris - Glad to hear our Fullforce brace is helping out your knee. Thank you for your purchase!

ACL vs OA
I have no known ligament damage but this brace is the only thing that is helping my medial pain from simple arthritis. I've had a Don Joy Everyday brace that was ok, but you'll never find replacement parts. For now this is one of very few braces you can get straps and liners for. These need to be replaced often for proper fit and performance.
Great brace, fast turnaround
I got the short calf on this Donjoy Fullforce after I got my ACL repaired last year. I'm 5'6" and the short calf is a great fit. My knee feels steady and protected with it on at practice.
Great brace, great customer service
Another model that I originally wanted is unfortunately not being manufactured any longer. The customer service people contacted me and explained how this brace was the recommended substitution and went over all of the brace's features so that I felt comfortable getting into the Fullforce instead. They were very helpful. The Fullforce arrived and I have been wearing it now for two weeks and it's both comfortable and supportive. Very pleased with my purchase.
Works great for skiing.
I had an ACL reconstruction earlier this year. I've used this brace skiing twice now and it works great. Even forget that it's there at times. Saw other people mention the brace sliding down your leg - haven't had this issue yet. Overall, I'm happy with the purchase.
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DME-Direct is a Donjoy Authorized Dealer Site
Donjoy believes that the best way for you to select and purchase a Donjoy product is at one of its authorized online stores of which DME-Direct is one. Only in these stores can you be sure to find the latest Donjoy collection and ensure you are getting a genuine Donjoy product with the manufacturer's full warranty.
Donjoy therefore recommends that you do not purchase a Donjoy item through any website, unless it is an authorized Donjoy dealer.
We are a Donjoy Authorized Dealer and can assure you a safe and pleasant shopping experience here at our website as if you were at our wholesale distribution premises in Valencia, California.
Some non-authorized sites sell counterfeit, second-hand merchandise, and/or products containing old fabrics, glues, and resins that do not perform as intended, and are therefore, not eligible for care under the Donjoy warranty. Others do not offer the original Donjoy warranty, nor do they offer any after-sales service of any kind.
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