SE-4 Knee Brace


Attention Medicare Patients

Provides improved support and full protection while playing light contact sports.
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Features & Benefits:

Four-Points Of Leverage Dynamic System
This patented technology was developed to reduce the strain on the ACL by distributing the load placed on the ligament via four points. Click here to learn how the Four-Points of Leverage works.
Low Profile
Designed so that it won't get in the way during activities

Is the DonJoy SE-4 Brace right for me?

Ideal for moderate to severe ACL, and/or CI (Combined Instability), PCL, MCL, LCL instabilities. Can be used during contact sports or daily activities. Try our Brace Advisor for personalized product recommendations to meet your needs!

Designed to support and protect:

  • Moderate to severe ACL injuries
  • Moderate to severe PCL injuries
  • Moderate to severe MCL injuries
  • Moderate to severe LCL injuries

Best for:

  • Baseball & Softball
  • Basketball
  • Football
  • Hockey
  • Lacrosse
  • Skiing
  • Snowboarding
  • Soccer

Support And Protection For Light Contact Sports

DonJoy SE-4 is ideal for moderate to severe ACL, and/or PCL, MCL and LCL instabilities. It is recommended for use in light contact sports.. The brace features a non-chip outer covering which is also safe for salt and fresh water activities.

DonJoy is please to introduce the most cost effective functional ligament knee brace known as the SE-4 Point, with its patented 4-point dynamic leverage system technology. The SE 4-Point has made a name for itself as a strong and low profile brace in the off-the-shelf market. The SE 4-Point provides the basic frame of the traditional legend at a fraction of the cost.

Knee Options (ACL, PCL, CI): Left, Right

Need Replacement Parts?

Shop Legend SE-4 replacement parts for full kits, straps, and pads.

Shop our complete selection of knee braces here.

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Product Questions

Is this model also made of Aircraft aluminum?
Question by: john on Jul 5, 2010, 8:03 PM
Yes, but it also has a Kraton coating to protect from chips and damage.
Answer by: Admin on Jul 5, 2010, 8:03 PM
Is the CI version for the MCL? What is the difference between the Legend SE-4 and the Legend?
Question by: Brandon on Nov 5, 2010, 1:03 PM
The CI version will address both ACL and PCL. The Legend SE-4 is the same as the Legend, but with an extra set of pads and liners.
Answer by: Admin on Nov 5, 2010, 1:03 PM
My measurements are K: 17 C:15.5 T: 21.5. What size should I get. Thank you.
Question by: Herbert on Feb 22, 2016, 9:05 AM
You will need to order the large size
Answer by: Admin on Feb 22, 2016, 9:05 AM
I work in manual labor all day for 10-14hrs a day. I have a stage 3 MCL and a stage 2 PCL tear, I'm trying to prolong surgery for as long as possible due to the extensive recovery time and rehab time. Will this brace give me back the mobility to where I could move freely again without the fear of my knee buckling?
Question by: Justin on Apr 25, 2016, 6:31 PM
Yes The SE-4 will provide multi-directional support to the knee but still allow your knoee free movement to do the activites that you need to do
Answer by: Admin on Apr 25, 2016, 6:31 PM
I have an ACL complete tear and knee is been trying to get out of place several times. Would it matter if I get the brace for ACL or CI?
Question by: Mike on Mar 20, 2016, 4:24 PM
You will want to go tith the CI strapping, as this will be the most supportive to you
Answer by: Admin on Mar 20, 2016, 4:24 PM

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.