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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’s 4-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.
DonJoy is so confident in the protection you’ll receive from the FULLFORCE knee brace they’ll pay $750 towards your surgery if your ACL is re-ruptured while this brace. You must register at www.donjoy.com/kneeguarantee to be eligible for this guarantee.
Click on the Size Chart tab above to learn how to measure your ankle to determine what brace size you need.
Click on the video tab for directions on how to get the proper fit.
HCPCS Code: L1845
Shop our complete selection of knee braces or browse additional DonJoy products.
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 1/2" | 12"-13" | 10"-12" |
| S | 15 1/2" - 18 1/2" | 13"-14" | 12"-14" |
| M | 18 1/2"- 21" | 14"-15" | 14"-16" |
| L | 21"- 23 1/2" | 15"-17" | 16"-18" |
| XL | 23 1/2" - 26 1/2" | 17"-19" | 18"-20" |
| XXL | 26 1/2" - 29 1/2" | 19"-21" | 20"-22" |
| XXXL | 29 1/2" -32" | 21" -23" | 22" -24 |
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1.Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted. |
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2. Measure up six inches from the center of your knee with a tape measure, as shown. |
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3. Measure the circumference of your thigh at the 6-inch mark, as shown. |
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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.
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DonJoy Defiance III Custom Knee BraceRecognized as the best ligament knee brace available. Top-of-line protection that is custom fit for your leg. Ideal for athletes looking to prevent a knee ligament injury or re-injury to surgically repaired ligaments.
$899.99 each
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DonJoy Undersleeve (Cotton/Lycra) for Knee BracesAbsorbant sleeve worn under a knee brace to enhance comfort and protect skin.
$24.99 each
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DonJoy Armor Knee Brace with FourcePoint HingeIncludes the ligament protection of the Armor knee brace and even more ACL protection from the FourcePoint hinge.
$549.99 each
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