Defiance Knee Brace
Defiance Knee Brace
Defiance Knee Brace
Defiance Knee Brace
Defiance Knee Brace
Defiance Knee Brace


The custom Defiance is DonJoy's flagship knee brace. With clinically-proven technology including the 4-Points-of-Leverage System™ plus innovative, high-tech materials and design, this lightweight brace provides durable support for moderate-to-severe ACL, PCL, MCL and LCL instabilities. Plus, the low-profile design fits comfortably underneath clothing and sports uniforms, including hockey and football. As the strongest of DonJoy's functional braces, the custom, carbon composite Defiance is recommended for high-collision sports, while its featherweight materials and custom fit also make it the brace of choice for activities of daily living. Available with the LoPro FourcePoint Hinge, the only hinge clinically-proven to protect the ACL. Defiance technology is on the field, on the court, on the slopes and in the water protecting knees and providing confidence to those who wear it. First introduced in 1992, DonJoy has produced more than a million braces; in college football alone, 22 of the Associated Press Top 25 teams use the Defiance knee brace.

Defy the status quo; choose your Defiance color!

Indication: Hyperextension; Moderate to severe ACL or PCL Combined Instabilities (CI); ACL or PCL reconstruction; Prophylactic use

Ordering Information


FourcePoint Technology
Football Knee Braces
Knee Ligament Injuries
Motion is Medicine – Jennifer's Story
DonJoy Defiance Knee Brace Overview

Features & Benefits

  • Backed by DonJoy's Knee Guarantee Program™
  • Custom-made craftsmanship
  • Lifetime warranty on frame and hinges
  • Clinically-proven 4-Points-of-Leverage System™
  • Custom fabricated
  • Swooping Thigh Cuff for inner thigh clearance and bilateral brace use
  • Strong, lightweight carbon composite frame
  • ACL, PCL, or Combined Instability (CI) strap configurations
  • 24-hour turnaround time


  • Patented, clinically  proven FourcePoint™ hinge technology (stop kit not included)
  • Over 40 custom frame colors and graphics
  • Defiance Extra includes reinforced carbon composite frame
  • Metal Caps - PowerCaps, metal strap tab caps (recommended for contact sports)
  • High strength stainless steel gears (recommended for contact sports)
  • Standard Low Profile Hinge
  • DropLock Hinge


Ordering Information

Each Defiance is custom made.
Measurements taken with CCMI Mark III or casted in weight bearing.

Size Thigh Calf
Minimum 12.5" (31.8 cm) 10.25" (26 cm)
Maximum 38.125" (97 cm) 26.25" (66.5 cm)


Part Number Description Size
11-0075-x-00000 Lycra Suspension Sleeve S - XXL
11-0122-x Neoprene Suspension Sleeve XS - XXL
11-1006-x-06000 Impact Guard S - XXL
11-1367-9-06000 Calf Pinch Guard Universal
11-0398-9-00000 Full Extension Stop Universal
25-0422-0-00000 Flexion/Extension Stop Kit Universal
11-0103-x-06000 Sports Brace Cover (short) S - XXL
11-0016-x-06000 Sports Brace Cover (standard) S - XXL
n/a Slide Shield Universal
n/a Suede Strap Pad Kit Universal
n/a Suede Liner Kit Universal
n/a Chamois Strap Pad Kit Universal
n/a Chamois Liner Kit Universal
n/a Chamois Pneumatic Universal
11-0400-9-00000 Pneumatic Condyle Pad Universal
25-1923-0-06000 Air Condyle Kit Universal
25-1480-0-00000 Brace Bag Universal
11-1525-x Tru-Pull Advance Attachment XS - XXXL
11-1415 Sili-Grip Strap Pad Kit Universal
11-0543-x-06000 Neoprene Suspension Strap Kit

1 = XS, 2 = S/M, 3 = L/XL/XXL

11-0029-9-06000 Slide Shield n/a
11-0388-0-00000 Pneumatic Chamois Liner n/a
11-0177-0-00000 Chamois Liner n/a
11-0757-x-06000 Chamois Strap Pads n/a




DonJoy has provided relief and stability for me for over a decade now, and I can honestly say it is the best product on the market and the quality is superior. My DonJoy knee brace and I were inseparable after five knee surgeries to repair ACL and meniscus tears during my high school years. While these injuries shattered my dreams of playing collegiate and pro basketball, my faith in God and my determination to rehab properly, which included the use of my DonJoy brace, allowed me to continue to play the game I love throughout most of my high school years. God had other plans for my life, and I am living proof, at the age of 32, that you can overcome obstacles and come out stronger than you ever imagined possible. My advice to any one going through serious injuries and orthopedic surgeries is to pay attention to your body and err on the side of caution, regardless of the varying opinions you will receive from your medical team. My advice comes from experience, as my second ACL and meniscus tear came halfway through the basketball season when I felt I was getting stronger and competing at almost 100 percent. I made a decision to not wear my DonJoy brace in a game and sustained the injury, resulting in more surgery and rehab. Suffice it to say, I wore my DonJoy brace after the fifth surgery and still rely on their products to this day. While I no longer need the ACL brace, I will always have a DonJoy sleeve or other DonJoy product for stabilization and peace of mind. My knees are stronger now than in my early twenties. In fact, I am an avid runner and enjoy competitive running. Also, I never miss an opportunity to play a pick up game of basketball with friends. Prior to becoming sold on DonJoy, I tried another brace and there is honestly no comparison in the quality and stability the DonJoy product affords the user. The saying, you get what you pay for can truly be applied in my opinion of this other product. Spare no expense when it comes to a product like DonJoy that can give you your functionality back after a serious knee injury and provide you the quality of life that you deserve. My advice to all, whether you are a trained athlete or a weekend warrior, is to be smart and listen to your body. This is advice learned after pushing my limits. As an athlete, there is a fine line between pushing through the pain and taking care of an injury that could potentially define you for the rest of your life. DonJoy products work. Anyone ready for a run or a game of hoops? ”

~ K.K. (Ketch) Willis

I've had my DonJoy for about 10 years due to some medial meniscus issues. It has always brought immediate relief as soon as I put it on but I learned just how strong it was this week when I fell off a scooter while wearing my brace in Panama. I was wearing my brace as I always do on long-walking days (thankfully) and as I crashed into my left leg, the one with the DonJoy, the brace almost completely protected my entire leg of injury. I have one scratch on the part of my knee that wasn't covered but that's it! Now I know this isn't the purpose of the brace, but not only did it break my fall, protect my leg, it also didn't break. I’ve worn it every day since and have a whole new appreciation for the brace. 10 years old, 1 scooter crash, and it's as great as the day I got it, other than some new, gnarly scratches. Cannot recommend this brace more.”

~ Alissa Heim