Female Fource ACL (Off-the-Shelf)


Attention Medicare Patients

Designed for especially for women. Low profile, moldable aluminum frame with FourcePoint hinges.

Is the Female Fource Brace right for me?

For female athletes returning to their sport after an ACL injury. Try our Brace Advisor for personalized product recommendations to meet your needs!

ACL Brace Specifically Designed for Women!

Females are 2-10 times more likely to sustain an ACL tear than males. The DonJoy Female Fource by DJO addresses biomechanical factors that have been implicated in the high incidence of anterior cruciate ligament (ACL) tears in females. The Female Fource incorporates DonJoy Orthopedics’ (DJO) FourcePoint hinge technology, which has been clinically demonstrated to increase knee flexion angles1, 2, limiting the time the knee spends in at-risk positions during activity; therefore, providing females the protection they need.

The Female Fource is a functional knee brace that comes with a custom graphics sticker sheet to allow patients to personalize their braces to their own liking.

DonJoy’s (DJO) OTS Female Fource is a lightweight, low profile functional knee brace designed specifically for females and is perfect for the active female returning to sport or the general female population returning to activities of daily living where an OTS brace is required.

Features and Benefits

  • Patented FourcePoint Hinge Technology: Bracing technology clinically proven to protect the ACL
  • Reduces the time spent near full extension, or in the "at risk" position
  • Enhances the Four-Points-of-Leverage design by increasing the posterior load applied by the brace on the tibia
  • Improves a patient's natural gait by applying progressive resistance before reaching a firm end point
  • Four-Points-of-Leverage design for superior ligament protection and comfort
  • Medial Swooping Thigh Frame for increased medial thigh clearance
  • Press fit upper thigh rivets for a low profile, sleek design
  • Swiveling strap tabs to match anatomy through movement
  • Anti-Migration calf strap and Supra condylar Pad for brace suspension
  • Custom Graphics Sticker Kit to personalize the brace to your own liking
  • Lightweight (18oz)
  • Aluminum frame is pliable and can be adjusted to a custom fit
  • One-year warranty on frame and hinge

Note: This product is NOT recommended for PCL injuries or instabilities

***NOTE: This item can take up to 2 weeks to ship***

Replacement Parts

Need new straps or pads? Shop DonJoy Female Fource replacement parts for full kits and individual condyle pads, undersleeves, straps and more.

Shop our complete selection of knee braces or browse additional DonJoy products.

1. Lin CH, Liu H, Garrett WE, Yu B. Effects of Knee Extension Constraint Brace on Selected Lower Extremity Motion Patterns During a Stop-Jump Task. Journal of Applied Biomechanics.2008;4:158-165.

2. Stanley C, Creighton R, Gross M, Garrett W, Yu B. Effects of a Knee Extension Constraint Brace on Lower Extremity Movements after ACL Reconstruction. Clinical Orthopaedics and Related Research. 2011; 469(6):1774-1780.

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Product Questions

is it okay to use this brace to swim in?
Question by: Jill on Jan 20, 2011, 1:28 PM
Hello Jill,

You'll want to rinse the brace in fresh water after immersion.

Also you may want to purchase a tube of DRY Teflon Lube, adding a drop in the back of the hinge after immersion. This step will keep the hinge functioning properly.
Answer by: Admin on Jan 20, 2011, 1:28 PM
It says it has a moldable frame. Do I just bend the frame to create a better fit or what is the best way to do this? I need it to be a little tighter around the calf because it rubs a lot.

Question by: Mandy on Jan 8, 2015, 4:59 PM
You can either bend if too big or pull the frame if too small. You will not break it so go ahead and mold it that way
Answer by: Admin on Jan 8, 2015, 4:59 PM
I bought this knee brace by mistake but would like to know if it would help my knee. I have arthritis and trying to prolong a knee replacement. I also have condomalsa . I'm very active in Zumba and walking.
Question by: Bonnie on Mar 22, 2016, 9:03 PM
The Female force knee brace is mainly for ACL injuries, but will offer general support to an arthritic knee as well. If you want a brace that will unload the arthritic area of your knee then you will want to go with one of our Unloading braces such as the OA Full Force. The Full Force offers that same general support but also can unload one side of the knee that is bone-on-bone
Answer by: Admin on Mar 22, 2016, 9:03 PM
If my measurement is in between Large and Medium (21”, 15”, 15"), which one should I get?
Question by: Ri on Nov 18, 2015, 11:20 PM
I would suggest the Large and if you feel it is a little too big in the frame of the brace it can be molded
Answer by: Admin on Nov 18, 2015, 11:20 PM
These say they have increased medial thigh clearance. Is the clearance increased enough to wear two together?
Question by: April on May 11, 2012, 8:38 AM
Yes you could wear two braces at once since the medial thigh portion is open.
Answer by: Admin on May 11, 2012, 8:38 AM

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" - 15.5" (33-39 cm) 12"-13" (30-33 cm) 10"-12" (25-30 cm)
    S 15.5" - 18 .5" (39-47 cm) 13"-14" (33-35 cm) 12"-14" (30-35 cm)
    M 18.5" - 21" (47-53 cm) 14"-15" (35-38 cm) 14"-16" (35-40 cm)
    L 21" - 23.5" (53-60 cm) 15"-17" (38-43 cm) 16"-18" (40-45 cm)
    XL 23.5" - 26.5" (60-67 cm) 17"-19" (43-48 cm) 18"-20" (45-50 cm)
    XXL 26.5" - 29.5" (67-75 cm) 19"-21" (48-53 cm) 20"-22" (50-55 cm)
    XXXL 29.5" - 32" (75-83 cm) 21"-23" (53-58 cm) 22"-24" (55-60 cm)

    Center Knee 1.Stand with your legs shoulder-width apart, legs slightly bent and leg muscles contracted.
    6 in Above 2. Measure up six inches from the center of your knee with a tape measure, as shown.
    Thig Circle 3. Measure the circumference of your thigh at the 6-inch mark, as shown.
    6 in below 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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