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The Armor FourcePoint design combines a strong lightweight aircraft quality aluminium frame and the low profile FourcePoint hinge with a protective
steel outer plate. By combining 2 patented technologies - the 4-Points-of-Leverage and FourcePoint hinge technology - the Armor FourcePoint provides one of the most powerful clinically-proven solutions to protect the ACL.


  • Moderate to severe ACL, PCL, CI, MCL and LCL instabilities.
  • Enhanced 4-Points-of-Leverage
  • Low profile FourcePoint hinge with steel outer plate
  • Mouldable, medial swooping frame for custom fit
  • Short calf for boot clearance
  • Flexion-extension control
  • Strong aircraft quality aluminium frame
  • Standard anti-migration Supra Condylar Pad
  • Internally mounted strap tabs
  • 1 year warranty on frame and hinge
  • 6 month warranty on soft goods


  • Patented clinically-proven FourcePoint hinge technology
  • Over 40custom frame colors and graphics
  • Defiance III Extra includes reinforced carbon composite frame
  • PowerCaps—metal strap tab caps (recommended for contact sports)
  • High strength stainless steel gears (recommended for contact sports)
  • ACL, PCL, or Combined Instability (CI) strap configurations
  • Standard or short frames available

Also available:

Adjustable OA Defiance®

  • Designed for the active OA patient, custom made Adjustable OA
  • Defiance provides durable support for moderate to severe levels of osteoarthritis.
  • The bilateral hinge bars offer support for ligament instabilities and work in conjunction with a patented telescoping condyle pad which puts the load control in the hands of the patient.
  • The 3-Point Off-loading mechanism shifts load away from the damaged part of the knee


  • Minimum thigh 31.8cm, (12 ½") , calf 26cm (10 ¼")
  • Maximum thigh 97cm (38 1/8 "), calf 6.5cm (26 ¼)
Defiance et Defiance III Datasheet:
pdf FR |
FourcePoint Technology:
mp4 FR |
Defiance video:
mp4 FR |
DonJoy - Garrett McNamara Surfing World Record 78ft Wave:
mp4 FR |
FR Catalogue 2016:
DonJoy Roll Up Banner:

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