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Donjoy Defiance Knee Brace

The Defiance is DonJoy’s custom knee ligament brace.  DonJoy’s Defiance is the only brace proven to protect the ACL.  Current research indicates that during weightbearing and nonweightbearing exercise, the 4-Points-of-Leverage brace significantly decreased ACL strain for anteriorly directed loads.  Research also indicates that the strain shielding capabilities of the 4-Points-of-Leverage brace are relevant for common ACL graft strains experienced during rehabilitation.  The Defiance brace also provides support for moderate to severe LCL, MCL and PCL instabilities. 

The Defiance offers a perfect fit for extreme water, contact and non-contact sports, as well as for everyday activities. It is comfortable, low profile and will fit under clothing and sports uniforms. Every DonJoy custom knee brace comes with a lifetime warranty on the frame and hinges and a six-month warranty on soft goods.  With Donjoy, you will receive the most innovative and highest quality knee ligament braces on the market.

Features and Benefits:

  • 4-Points-of-Leverage System provides ligament stability
  • Swooping thigh cuff for inner thigh clearance and bilateral brace use
  • Anti-Migration Band anchors on the upper calf enhancing brace suspension
  • Custom fabricated based on patient measurements or cast mold
  • Supra Condyle Pad to promote brace suspension
  • Swiveling strap tabs to accommodate leg movement
  • Flexion and extension control
  • Strong, lightweight carbon composite frame
  • ACL, PCL or Combined Instability strap configurations
  • High strength stainless steel gears
  • Standard or short frames available
  • Backed by the DonJoy Knee Guarantee

The DonJoy Defiance can be used for:

  • ACL/PCL injuries
  • Meniscus repairs
  • Tendonitis and bursitis
  • Patellofemoral dysfunction 

Accessories (not included):

  • Impact guard
  • Power caps
  • Calf pinch guard
  • Swivel strap tabs
  • Anti-migration band 
  • Neoprene or lycra undersleeve


Knee Braces & Straps