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DonJoy SE-4 Knee Support

Provides improved support and full protection to your knees while playing light contact sports.

This item requires custom fitting and is only available through your doctor with a prescription.

Alternative Product Solutions


DonJoy is pleased to introduce a 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 reliable 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. 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 freshwater activities.

Features & Benefits

  • Low-profile design
  • Four-Point Dynamic Leverage system helps reduce strain on the ACL
  • Made with strong, aircraft grade aluminum for maximum support
  • Designed to support and protect moderate to severe ACL, PCL, MCL, and LCL injuries
  • Best for baseball, softball, basketball, football, hockey, lacrosse, skiing, snowboarding, soccer, tennis, volleyball and fitness

Size Chart & Fit Guide

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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DonJoy SE-4 Knee Brace

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    Customer Reviews 8 item(s)

    a great product that saved my holidays

    Reviewed by:
    Verified Purchase
    My ACL snapped and my PCL tore. The doctor saw the meniscus damaged. I had non-refundable holiday all paid up. I bought the brace and it has been wonderful. It allows me to play tennis as if I had no injury whatsoever. I gained my confidence bit by bit and I am also walking and bicycling.
    Pros: It is great for sports where I have to run and twist without worrying my knee will wobble.
    Cons: I cannot use it for other type of activity like mat Pilates or Yoga, as when I hit the ground, it just moves out of its place. I wish I could use it for both tennis and Pilates.
    Share Your Usage: Sports, Recovering from Injury
    Posted on February 4, 2018

    Great brace for the buck-

    Reviewed by:
    Verified Purchase
    I was surprised how well-made it was for the price. It fit nice and solid, did not migrate even a quarter inch.
    Pros: Craftsmanship was top notch. It fits better than my old prescription 1000 dollar brace ever did. Just a little tight.
    Cons: Finicky stuff...longer straps. The calf and the behind the thigh straps were about an inch too short. I had to raid my old brace for its straps, and there you go...just fine. Perhaps better condyle pads and perhaps a slightly wider "quad cage."
    Share Your Usage: Occasional Use, Preventing Injury, Sports
    Posted on July 10, 2017

    Great build.

    Reviewed by:
    Verified Purchase
    Some extra side pads would be good to add, as current ones already chipping after few uses, else the knee brace is value for money
    Pros: Sturdy and well designed,
    Cons: More videos of kind of movements not permissible or not advisable per brace will be helpful in quick decisions and purchase.
    Share Your Usage: Sports
    Posted on May 31, 2017

    Well worth the pricetag!

    Reviewed by:
    Gets a little getting used too on the field...but this knee brace held my torn ACL knee together....I was cutting and stopping with no knee pain and no problems....
    Posted on October 12, 2014

    Great stuff

    Reviewed by:
    Verified Purchase
    Bought my donjoy se-4 four years ago due to acl and meniscus tear , thanks to it I can play soccer and basketball without worry but need to get the right size as I've bought one above my size which gave me some problem. Slight issue I have with it is when i sweat it has the tendency to slide down.
    Posted on April 24, 2014

    I love this Brace!

    Reviewed by:
    This brace gives my knee the stability and support it needs to do my job. I work in a small package environment, and need my full range of motion. I squat, climb, speed walk, and carry bulky and heavy items. I tore my acl a few months ago, and with Physical Therapy, and a lot of hard work, I haven't had to have surgery. I still have weakness in the joint, but wearing this brace has allowed me to return to work without limitations. Excellent design, more comfortable than any other brace I have worn, and once you get used to putting it on, easy to wear.
    Posted on September 1, 2013


    Reviewed by:
    Verified Purchase
    Bought this for my junior year because i injured my knee during my sophomore year and have a meniscal tear making my knee unstable. While being a lineman i know that our knees take a lot of abuse and a brace like this is needed. I'm really happy with it, it's very comfortable, decent weight, and stays in place. And it's a good value for a knee brace if you are tight on money.
    Posted on July 3, 2013

    Very Good Braces

    Reviewed by:
    Verified Purchase
    Bought these for my son who is a High School Freshman. He tweeked a knee in baseball and it followed him to the football field. He plays offensive line (center to tackle as needed) and figured braces were chheaper than surgery at this stage of his life. The initial difficulty with fitting was resolved by the school trainer. He had no problems with mobility, and after a week can barely tell he has them on. He took a couple of hard hits directly to and below the knee with no complications. I would highly recommend these braces for HS Football and possibly on to College.
    Posted on October 2, 2012