DonJoy Armor with FourcePoint – Brand Zero-Friction Extreme ACL Protection & PerformanceDonJoy Armor with FourcePoint Rigid Knee Brace The DonJoy Armor with FourcePoint is the most advanced clinical orthosis engineered specifically for the protection of the Anterior Cruciate Ligament (ACL) during high velocity activities and impact sports. By integrating patented FourcePoint hinge technology, this brace creates a Zero Friction environment that increases resistance during the final stages of extension, physically preventing the knee from

DonJoy Armor with FourcePoint™ Rigid Knee Brace

The DonJoy Armor with FourcePoint™ is the most advanced clinical orthosis engineered specifically for the protection of the Anterior Cruciate Ligament (ACL) during high-velocity activities and impact sports. By integrating patented FourcePoint™ hinge technology, this brace creates a Zero-Friction environment that increases resistance during the final stages of extension, physically preventing the knee from entering the "at-risk" position. Built on a reinforced aircraft-grade aluminum frame with the proven Four-Points-of-Leverage™ system, the Armor FourcePoint provides an uncompromising mechanical anchor for the femur and tibia. This orthosis is the premier clinical choice for athletes returning to competitive sports following ACL reconstruction, as well as those managing PCL or Combined Instabilities (CI) in extreme environments.

Have questions about FourcePoint™ dampening, ligament-specific configurations, or national delivery? Speak with a Clinical Mobility Expert now: 866-218-0902

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Clinical Features & Patient Benefits

• Patented FourcePoint™ Hinge: Features a "Zero-Friction" reactive dampening system that increases resistance in the last 25% of extension, significantly reducing the mechanical load on the ACL.
• Four-Points-of-Leverage™ Design: Specifically engineered to provide a "Zero-Friction" constant force to the tibia, managing translational stress and keeping the knee in a safe anatomical alignment.
• Reinforced Aircraft-Grade Aluminum Frame: Provides "Zero-Friction" structural integrity with high-strength 6061 T6 aluminum, offering the durability needed for contact sports and extreme activities.
• Swiveling Strap Tabs: Specifically engineered for a "Zero-Friction" personalized fit, allowing the brace to move dynamically with the leg to prevent slippage during high-intensity movement.

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The Clinical Authority: Why Professionals Trust the Armor FourcePoint

Orthopedic Surgeons and Sports Medicine Specialists specify the DonJoy Armor with FourcePoint™ for its "proactive-protection" capabilities. Its "Zero-Friction" environment is the gold standard for high-performance athletes where standard hinges cannot offer sufficient deceleration control. By providing a rigid external framework that mechanically manages joint extension, the brace reduces the risk of non-contact ACL injuries. This targeted approach is highly effective for rebuilding patient confidence during the final stages of rehabilitation and ensuring maximum safety during a return to high-demand sports.

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FAQ: ACL Protection & Hinge Technology

What is the benefit of the FourcePoint™ hinge?
The "Zero-Friction" FourcePoint hinge acts like a shock absorber for your knee extension, preventing the joint from snapping straight and putting dangerous stress on a healing or reconstructed ACL.

Can this brace be used for PCL or CI injuries?
Yes. The "Zero-Friction" Armor frame is available in specific configurations for ACL, PCL, and Combined Instabilities (CI) to match your specific clinical diagnosis.

Does it fit either leg?
No. To provide a "Zero-Friction" anatomical fit and correct mechanical leverage, the Armor FourcePoint is specifically contoured for either the Left or Right knee.

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Specifications & Sizing Table

Selection is based on the circumference of the thigh (6" above mid-patella). Measure carefully for an optimal "Zero-Friction" clinical fit:

Size	Thigh Circumference (Inches)	Availability Note
X-Small	13" – 15.5"	Limited configuration availability
Small	15.5" – 18.5"	Standard ACL/PCL stock
Medium	18.5" – 21"	Full availability (All Configurations)
Large	21" – 23.5"	Standard ACL/PCL stock
X-Large	23.5" – 26.5"	Standard ACL/PCL stock
2X-Large	26.5" – 29.5"	Check availability for CI Left
3X-Large	29.5" – 32"	Check configuration constraints
Hinge Type	Patented FourcePoint™ Dampening
Frame Material	Reinforced 6061 T6 Aluminum

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Fast National Delivery Available
Need this extreme-duty rigid stabilization delivered to your door? We provide fast, reliable national shipping. For our local Southwest Florida neighbors, we also offer same-day pickup at our showrooms in Sarasota, Fort Myers, and Naples.