11-32XX-X 11-32XX-X 439.99

FullForce Ligament Knee Brace


Availability: In stock

Provides complete protection of the ACL for athletes who don’t want to loose speed by weighing themselves down with a heavy brace.

* Required Fields


Product Details

Product Description

A lightweight brace that provides complete ACL protection.

The DonJoy FULLFORCE knee brace is one of the most powerful and clinically proven solutions for protecting the ligaments of the knee, especially the ACL, from injury.

The FULLFORCE is most commonly worn by competitive athletes who suffer from any of these conditions, can't afford to be weighed down by a heavy brace, and are not trying to prevent contact or impact related injuries (like a football lineman might want to do).

This knee brace is designed to provide complete protection of the knee for competitive athletes who are at the greatest risk for injuring their ACL. Utilizing DonJoy's4-Points-of-Leverage system and the FourcePoint hinge, knee instabilities are continually corrected. This means an injury doesn't have to occur for this brace to work - it significantly decreases your chance of getting hurt in the first place!

The FULLFORCE knee brace is sleek, low-profile, and exceptionally light weight. It is ideal for mobile athletes like wide receivers or basketball players that are looking for complete protection for their knee, but don't want to sacrifice speed.

The DonJoy FULLFORCE knee brace is used to treat or prevent the following injuries:

  • Moderate to severe ACL instabilities
  • MCL or LCL instabilities
  • After ACL reconstruction surgery
  • Hyperextension

Product Features...and the benefits you'll experience!

  • Four-Points of Leverage Dynamic System
    This patented technology was developed to reduce the strain on the ACL by distributing the load placed on the ligament via four points. Click here to learn exactly how the Four-Points of Leverage works.
  • FourcePoint Hinge Technology
    Makes you less likely to suffer from an ACL injury because it reduces the amount of time your knee is in an "at risk position", enhances the Four-Points of Leverage by increasing the posterior load applied by the brace on the tibia, and improves your natural gait by applying progressive resistance before reaching a firm end point during movement.
  • Strong Aircraft Grade Aluminum Frame
    You get the benefits of a lightweight and low profile knee brace that is also stronger, thicker, and more stable than the other lightweight knee braces on the market.
  • Swiveling, Internally Mounted Strap Tabs
    Get a perfect fit by molding the brace to your knee, as well as enhance the fit and suspension of the brace with the swiveling strap tabs.

Sizing and Measurements

Click on the Size Chart tab above to learn how to measure your ankle to determine what brace size you need.

Instructions for Use...how to properly fit your DonJoy FULLFORCE knee brace.

Click on the video tab for directions on how to get the proper fit.

Shop our complete selection of knee braces or browse additional DonJoy products.

Size Chart & Fit Help

Take the measurement of your thigh and calf 6" above and below your kneecap using a flexible type tape measure.  Use the diameter you measure here to choose your size.

    Size Thigh Knee Center Calf
    XS 13" - 15.5" (33-39 cm) 12"-13" (30-33 cm) 10"-12" (25-30 cm)
    S 15.5" - 18 .5" (39-47 cm) 13"-14" (33-35 cm) 12"-14" (30-35 cm)
    M 18.5" - 21" (47-53 cm) 14"-15" (35-38 cm) 14"-16" (35-40 cm)
    L 21" - 23.5" (53-60 cm) 15"-17" (38-43 cm) 16"-18" (40-45 cm)
    XL 23.5" - 26.5" (60-67 cm) 17"-19" (43-48 cm) 18"-20" (45-50 cm)
    XXL 26.5" - 29.5" (67-75 cm) 19"-21" (48-53 cm) 20"-22" (50-55 cm)
    XXXL 29.5" - 32" (75-83 cm) 21"-23" (53-58 cm) 22"-24" (55-60 cm)

    Center Knee 1.Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted.
    6 in Above 2. Measure up six inches from the center of your knee with a tape measure, as shown.
    Thig Circle 3. Measure the circumference of your thigh at the 6-inch mark, as shown.
    6 in below 4. Measure down six inches from the center of your knee with a tape measure, as shown. Then measure the circumference of your calf at the 6-inch mark.


Ask A Question (33)

Product Questions

DonJoy FullForce Ligament Knee Brace

Product Questions

Ask a Question

Ask Your Own Question

You're Asking About: DonJoy FullForce Ligament Knee Brace

You'll receive your answer via email either the same or next business day


Sort by Ascending
  • David at 04/06/2014 00:37
    • Hi, I had an ACL surgery 8 months ago, and I still have some pain in my knee I think it is because I need more strength on my quadriceps, but when I work out the pain comes. I used to practice kitesurfing and some running, do you recommend the fullforce knee brace?
      I’m 5’4” tall and the measures of my injured knee are: Thigh 17,7” Knee 14,2” and Calf 13,4”.
      I hope this measures increase while a get my leg stronger since my good knee measures are: Thigh 19,3” Knee 14,2” and Calf 13,8”.
      Which size should I buy Small or Medium? I will buy also the neoprene sleeve.
      PD: if I get the short one, should I still measure 6” above and bellow the knee?
      thanks in advance
    • David
      Based on your measurments and considering that you will most likely build up more muscle in your thigh I would say go with the medium brace. The frame is moldable so you can make it tighter on the thigh and the calf, then when you feel it is getting tighter you can pull the frame out a little to make it bigger. The short version is still measured at 6" below the mid kneecap.
  • Mike at 03/06/2014 08:44
    • I've read that the DonJoy Full force brace is lighter than the Action Armor Extreme brace, but would like to know what exactly is the weight difference between the two? I'm 5'8" and weigh about 195 lbs. so am thinking that the weight difference would not make that much of a difference for me because of the muscle mass that I carry. I would like to use the brace for playing basketball, running 5Ks to marathons, swimming and biking (Xterra races). I have a partial meniscus tear and ACL Patella autograft revision (2nd ACL reconstruct) on my left knee and also a Patella ACL reconstruct on my right knee. The left knee was done in 1989 with a hamstring autograft and recently redone 3 weeks ago, and the right knee was done in 1998. Thank you!
    • Thank you for your question. the weight difference would be about 1 ounce. This it not a significant amount, however when running long distances or using it for an extended period of time, one may notice the weight difference. the Armor is a thicker brace and generally suggest for contact/extreme sports.
  • John at 31/05/2014 05:21
    • Hello,

      My FullForce knee brace shipped with a packet of metal pieces labeled 45, 60, 75, and 90, and two small screws. The packet itself was labeled with the number "12-2352-0-00000." What is this hardware used for?

      Thank you.
    • John
      That is the flexion/extension stop kit. That would only need to be used if your physician wanted you to have limited range of motion. The pieces go into the hinge to limit movement of the knee
  • David at 08/04/2014 03:51
    • My son had a partial tear of his ACL about a year ago. He ha since started traveling soccer, and keeps tweaking his knee. He needs a brace for support and we are looking at the full force ligament brace. He is only 12 so we would like to get a brace with room for growth. He measures thigh- 17" ,Knee14 3/4 ", and calf 14" what size would you recommend ??

    • Thank you for your question. Although your son's measurements for his knee and calf fit in the low range of the Medium measurements, his thigh is well within the small range. It would be suggested to go with the small, which will accommodate his knee and calf, and would allow room for thigh girt development.
  • Joe at 05/04/2014 16:45
    • I am awaiting surgery to repair a ruptured ACL and a medial meniscus tear. In the mean time I am looking for a brace to wear for pre-op protection and stability that I can also use for protection & stability to return to non-contact/minimal-contact recreational sports (triathlon, lacrosse, & maybe hockey) after my recovery. I'm 40 yrs old, 6'0, 165lbs. I'm leaning towards the Full Force w/ Fourcepoint hinge, but have 3 questions.

      1. I see that the Amor brace now comes with a low-profile Fourcepont hinge. Does the Full Force also offer the low-profile Fource Point hinge?

      2. Is there any reason not to get the CI version with the extra strap, even though my injury was strictly with the ACL? Would the CI version provide extra protection and stability? Is it easy to add/remove the extra thigh strap to convert the brace back and forth between CI and ACL only?

      3. I understand that the Armor is stronger and heavier, having two layers of aluminum rather than just one, but can you tell me exactly what the weight is for the Full Force and for the Armor? I understand that it would depend on the size, but I'm just looking for some numbers for comparison sake. For what it's worth, I'd be buying a medium. I'm trying to get an idea of how much weight I'll be adding to my leg as compared to the neoprene brace that I have now.

      Thank you very much!!!

    • Joe
      1. The FullForce has the same low-profile fourcepoint hinge as the Armor
      2. Get the ACL stapping you do not need the CI strapping
      3. The Armor is 23 oz and the Full force is 20 oz
  • Marcos at 29/03/2014 16:34
    • Another question: is possible to run and go to the gym with the fullforce brace? Thank you once again
    • Yes you can do any physical activity in the Full Force
  • Marcos at 29/03/2014 16:27
    • Wich flexion is achieved with the fullforce? Is there any difference to armor.? Thank you
    • The difference between the full force and the armor is the thickness of the aluminum fram only. The Armor is thicker and would be a better brace for full contact sports or skiing. The Full Force is lighter wieght and is better for speed
  • Gail at 13/01/2014 00:08
    • How much does the brace weight?
    • 20 oz
  • David mazariegos at 11/01/2014 08:23
    • I just had an acl surgery, looking to get back to basketball soon. What is the best knee brace for a big fella?
    • David
      The full Force is a good brace post surgery to get back into sports. Make sure you follow the sizing chart and if you do not fit into one of the sizes you may need to custom
  • Tommy at 31/12/2013 02:06
    • I had ACL recon almost 8 mo ago. I recieved my Fullforce knee brace, and trying to fit and set the settings. I have flexion and ROM, and will be using it while playing baseball and hiking. About the settings, do the resistance adjustment screws control extension or flexion? Also, does the resistance switch control extension? I see that standard ext stops are at 10* but does turning the switch to "off" turn the ext stop off, giving full extension? At 10* i still feel like i need to extend fully to walk, run, and stand. Thanks.
    • Tommy,
      Thank you for your question. The flexion and extension stops need to be changed out though your Physical Therapy clinic or through a DonJoy rep. You can find your rep by entering your zip code into the following link.
      The FourcePoint Hinge offers resistance in the last 35 degrees of extension (that's with the 10 degree stop in, if changed to no extension stop it will begin to offer resistance at 25 degrees). You can change the resistance setting from 1,2 or 3, which offers 2,4, or 6 pounds of resistance during that last 35 degrees of extension. This will cause a deceleration giving protection to your ACL. You can also set the resistance to 0 (offering 1 lb of resistance) or turn it off simulating a standard hinge with no resistance.
      Please let us know if you have any further questions.
  • Kala at 06/10/2013 01:20
    • I am a level 8/9 gymnast and headed of to college next year and I have a question I fell and hit the inside of my knee. Since I was able to walk the doctor just did a x-ray and said all was fine I wear compression knee sleeves to combat swelling. I was wondering does DonJoy have a brace that would support my knee from feeling like it is giving out when leaping and tumbling. I have also noticed most companies really focus on football and basketball. Most braces I have had over the years hardly last 3 to 6 months. I would love to get a bunch of gymnasts together and help a company make braces that work for gymnastics. The foam pit really messes up velcro, and when it gets messed up we either stop wearing the brace, tape it, or try to replace it which isn't always an option with the price of gymnastics.
    • Kala
      Thank you for contacting product support. Take a look at our Reaction Knee Brace: https://www.betterbraces.co.uk/donjoy-reaction-knee-brace The Reaction reduces anterior knee pain by dispearsing force across the knee. It has a web design that stabilizes the patella on all sides and absorbs shock and shifts peak loads away from the painful area of the knee. Its comfortable to wear and it's breathable. This might work better than a traditional neoprene sleeve for the stuff that you will be doing. If you have any other questions please do not hesitate to ask.
  • Gus at 14/06/2013 02:24
    • Could this brace help prevent lateral knee dislocations. I'm a lineman and I've dislocated my knee 7 times in the past two years, and I'm worried i might tear something next time it happens
    • Hello Gus,

      Do you mean Knee Cap Dislocation? We have Patella Braces, to support the knee cap and provide proper alignment. The FullForce is an ACL Brace, and supports the MCL, and LCL. It supports the Ligaments of the Knee.

      The Fullforce is a great, light brace for football players who need knee support. But if you need a patella brace this is what I recommend.

      https://www.betterbraces.co.uk/donjoy-reaction-knee-brace https://www.betterbraces.co.uk/donjoy-tru-pull-lite

      For additional questions please call a Product Specialist. 1-888-405-3251.
  • Khiew at 30/05/2013 09:33
    • I just hd my ACL reconstruction surgery 3 weeks ago,im considering to buy Donjoy Fullforce or Armor knee brace...which one is suitable for me ??
      Im a Basketball player
    • Hello Khiew,

      If your unable to order a Custom ACL brace, and are interested in purchasing an Off the Shelf Brace, I recommend a Fullforce for basketball players, it's a lightweight brace, comes with fourcepoint hinge which protects the ACL, and has a swooping thigh cuff to accomodate your thigh.

      The Armour is best suited for football or contact sports. Its the strongest frame on the market.

      Please Call Us at 1-888-405-3251 so that we may assist you with placing your order.

      Have a Great Day.
  • David at 08/01/2013 20:43
    • This question was asked previously and it has to do with the pads pinching the knee and causing pain after a while. It was suggested to use the thinner pads, done. However, still some pain after about 2 hrs of use.

      I had originally gotten this before my surgery and it was fine, now that i have started PT and working again i have noticed this.

      I was told by the rep when i first got this, that the folds in the framework were made to be bent and adjusted to help with fitting. Whats the best way to bend it without breaking something?
    • David,
      If you are having some tightness at the knee joint, grab the brace at the condyle pads on the hinge and try and seperate the sides some, try it back on and see if that has alleviated the problem. Continue until you get a slight seperation that doesnt have a pinching feel, but you dont want to get it too wide that it starts to feel "sloppy" in the knee area.
  • Lyndsey at 22/06/2012 04:16
    • I had two questions regarding this brace.
      1. For MCL injury should I order the ACL or CI option?
      2. Reading above questions I noticed short people or people with calf muscles that sit high should order the shorter length. I am 5'4 female with a high, good sized calf muscle and I was wondering if it is recommend still that I order the short length or not? I want the best fit possible without too much compromise of support.
    • 1. ACL Strapping
      2. Short Calf
  • Chris at 14/06/2012 15:31
    • I am involved in contact martial art sports such as Brazilian JuJitsu and MMA. Is there any pad or sleeve that can go over these braces to protect my training partners from the metail hinges and rings?

    • You need the Donjoy Sports Cover.

  • jon at 16/05/2012 21:10
    • I have a tear in the miniscus and a repaired torn acl previously, my question is i would like to continue playing basketball and softball but i want to be protected. Is the don joy full force the best option for me because i like the fact that it is light weight so i can still move fast but i want to make sure it is supportive of my injury?
    • Yes the Donjoy FullFource would be the best option with your condition and activity level.
  • Max at 26/01/2012 02:24
    • Would this brace work for an MCL injury. If not is there a brace that would work for an MCL?
    • Yes the FullFource does support the MCL.
  • Tyler Beach at 20/12/2011 16:01
    • How do I wash the Donjoy Full Force brace?
    • You can wash all the softgoods by hand with laundry detergent, rinse, and air dry. Re-lubricate the hinges using a dry, Teflon based lubricant. Bicycle chain lubricant usually works well.
  • Tracey kingsley at 06/11/2011 09:17
    • Hi

      I am looking to purchase a donjon knee brace open hinged for skiing. I had an ACL reconstruction 20 months ago.

      1. Is the clearance Amor Fource point ACL knee brace suitable for skiing an tennis?

      2. Does it come in short length for skiing?

      3. Could I wear my thermal legging under the brace for comfort.

      4. Is their a female version?

      Please tell me which brace will be most suitable and comfortable for skiing with best propection that is lightweight with full protection after ACL reconstruction surgery.

      I look forward to hearing your recommendations



    • Hi Tracey,

      Either the Armor or FullForce braces will provide support for your ACL while skiing. The Armor and FullForce are the same brace, except the Armor is re-inforced making it the strongest off the shelf brace we carry. The Fullforce is the lighter of the two. Both braces have an option for a short calf length, which you will need to fit into ski boots and can be worn over a thin base layer. The female version of the FullForce comes standard with a short calf, but there is no difference in the frame to make it more female specific. Bottom line is either brace will privide solid protection, the Armor is stonger, the FullForce is lighter weight and slightly lower profile.

      If you have additional questions please call, 1-800-553-6019

      Have a great day.
  • Brandon at 08/07/2011 01:12
    • I am looking in to getting a new knee brace because the one I have no longer fits me properly. I am liking the full force knee brace, but I have a couple questions. First question, what is the difference between the short and standard length? The brace i have now is just under 15 inches, so i was wondering which length I should get? Also, I have been looking at the new Armour brace and was wondering how much of a weight different there is between the Armour and the Full Force?
    • The Donjoy Full Fource standard length is 16" the short is 15" so you should get the short. The Armor Knee brace is heavier than the Full Fource because it's made of a dense thick aluminum. Should you have any other questions please let us know.
  • Dave at 10/06/2011 23:42
    • How do I tell if I have a short or standard calf lenght?
    • A standard length brace is 16" in total length, from the thigh bar to the calf bar.
  • Ronald at 15/04/2011 01:09
    • I'm trying to decide between the DonJoy Full Force and the DonJoy Armor Knee Brace with FourcePoint Hinge. How does the hinge f\technology compare between these two braces?
    • The FullFource and the Armor with Fourcepoint Hinges have the same hinges. The Armor frame is a denser thicker aluminum frame recommended for contact sport athletes. Should you have any additional questions please call us at 800-553-6019.
  • Jim at 04/03/2011 18:13
    • Hi! I had ACL reconstrucive surgery a few months ago. I'm ready to go back to playing hockey and my ortho recommended wearing a knee brace. Would the standard or short calf model be best for me? Or does it even make a difference?
    • Hi Jim,
      Most Hockey players will wear a knee ligament brace with a short calf length to avoid pinching between the calf frame and top of the skate. So for comfort reasons I would suggest a short calf frame.

  • Dean Guiuan at 04/03/2011 02:40
    • Two Questions;

      1.) What is the difference between short and standard options?

      2.) I know the ACL option, what does the CI option mean?

      Thank you,
      Dean Guiuan

    • 1. The difference between short and standard is the length of the thigh cuff. The standard is one inch longer than the short.

      2. CI stands for Combined Instability. This is the option you would pick if you had an injury to both your ACL and PCL. It gives you an extra thigh strap in the front.
  • Frank at 06/12/2010 00:51
    • What would be the best and lightest brace possible at the Middle Linebacker position for football? The one that I have now by townsend is too heavy and is constantly sliding down.
    • Hello Frank,

      The DonJoy FullForce will provide the most support at the lighter weight than the Armor or other similarly constructed braces.

      The brace itself is malleable, meaning it can be bent without breaking. If you find that either cuff is loose and the straps aren't tight enough, simply bend the cuff to match the shape for a more snug fit.

      You may also want to try an undersleeve or Silicon Strap Padding to address migration.
  • Kyle at 02/12/2010 16:33
    • Is the Full Force made of carbon fiber or aluminum? The description says aluminum but the picture looks like carbon fiber.

    • The DonJoy Full Force Ligament Knee Brace is made out of aluminum. The Carbon fiber appearance is cosmetic. It's actually the same material the DonJoy Armor is made of.
  • Ray at 04/11/2010 18:44
    • I recently had acl surgery about three months ago, I getting a knee to start my running program and for when go back to playing football. I play d-line so they recommended the amor brace but i feel like the fullforce would be better for my style of play and for other sports activites I do. Like Muay Thai. I just need a suggestion on which would be better.

    • Hello Ray,

      The DonJoy Full Force Ligament Knee Brace is a great alternative to the DonJoy Armor. The Full Force is constructed of the same material as the Armor, but at a lighter weight. Ideal for quick moving activities where the impact protection offered by the Armor is not required.
  • Karen at 28/10/2010 16:55
    • I use a Full Force ACL brace and really like it. Can I swim with it on? if so, how do I care for it after it's wet?
    • Yes you can swim with it. After use, rinse with fresh water and air dry. Do not put any of the softgoods in the dryer.
  • Richie G at 05/09/2010 01:29
    • Will the full force rust in salt water? I have a armor and the "d" rings rusted out
    • Hello Richie,

      The DonJoy Armor Knee Brace has metal tabs and "D" Rings, but the DonJoy Full Force Ligament Knee Brace has plastic tabs and metal "D" rings. The rust should be less of an issue, but you want to be sure to rinse the brace in freshwater after immersion in salt water.
  • nate at 14/08/2010 23:08
    • i play football i am the running back i need a brace for both knees i have ripped my mcl on one knee and ripped my meniscus and acl on the other i need protection for both knees for everything whats the best knee brace for me?
    • The DonJoy Full Force is a great choice. Your other two options would be the DonJoy Armor which is stronger and slightly heavier brace that offers a bit more protection. If you want and can afford to go custom you would want to get the DonJoy Defiance knee brace. It's the lightest, strongest and best fitting option. It's the same ACL knee brace you see all the NCAA and NFL players such as Peyton Manning and Phillip Rivers using.
  • Bill at 04/08/2010 17:33
    • Hi. I am interested in getting a knee brace for soccer but I am wondering what would be best, the donjoy armor or the donjoy fullforce?
    • Hello Bill,

      The DonJoy Full Force Ligament Knee Brace is most commonly worn by competitive athletes that can't afford to be weighed down by a heavy brace, and are not trying to prevent contact or impact related injuries (like a football lineman might want to do).

      The FULLFORCE knee brace is sleek, low-profile, and exceptionally light weight. It is ideal for mobile athletes like wide receivers or soccer players that are looking for complete protection for their knee, but don't want to sacrifice speed.

      The DonJoy Armor is a studier, heavier brace designed to take more impact. Given your sport, I'd definitely go with a DonJoy Full Force Ligament Knee Brace.
  • Locke at 05/05/2010 18:42
    • Hi, I’m interested in the DonJoy Full Force Ligament Knee Brace. My question is what’s the difference between the CI or ACL option.
    • The difference between the CI and the ACL option for the DonJoy Full Force Ligament Knee Brace is the strapping sequence. The ACL option has 5 straps; 2 posterior thigh, 2 anterior calf, 1 lower posterior calf. The CI option has all 5 straps the ACL option has plus 1 extra strap on the anterior thigh.
Reviews (0)


DonJoy FullForce Ligament Knee Brace

    Write Your Own Review

    You're reviewing: DonJoy FullForce Ligament Knee Brace

    How do you rate this product?

    • Will not be shown on site

    I agree to the terms & condition by clicking the submit review button

    Your honest feedback
    helps other visitors
    in selecting their products

    No reviews yet.

    Please wait...