81-06XXX 81-06XXX 37.99

DonJoy Lateral J Patella Stabilizer

Stabilizes the kneecap to prevent dislocations and alleviate pain. Unique patented nylon core and polyester Lycra fabric, it allows for improved airflow while still giving ample support and compression.

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The DonJoy Lateral J knee brace is one of our most popular patella stabilizing brace. The brace is equipped with a tubular, lateral "J" buttress that runs alongside the knee and provides support against lateral patellar subluxation, dislocations, or improper patellar tracking. The Lateral J can be worn during day-to-day activities, as well as sports and in water.

Drytex or Neoprene? Drytex is DonJoy's exclusive solution for patients with neoprene sensitivities or those who prefer less warmth from their bracing. Constructed of a unique patented nylon core and polyester Lycra fabric, it allows for improved airflow while still giving ample support and compression. Perfect for people in warm weather climates and those with neoprene allergies or irritations. Neoprene is a thicker material that will provide more warmth.

With or Without Hinge? This brace is available with a removable hinge for added stability for an additional cost. You should order the brace with a hinge if you have joint instability. It will provide more medial and lateral support. Otherwise, you should order the brace without a hinge.

Features & Benefits

  • Available in drytex or neoprene
  • Select with or without hinge
  • Lateral to medial, adjustable straps provide additional stabilization and support
  • Tubular, Lateral "J" Buttress helps to stabilize the kneecap (available in left or right configuration)
  • Designed to support and protect patellar dislocation, lateral patellofemoral malalignment, lateral patellar subluxation, and chondromalacia
  • Best for everyday activities and non-contact sports

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)
    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 Lateral J Patella Knee Brace

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    Customer Reviews 11 item(s)

    Great patellar support!

    Reviewed by:
    Just got this patellar brace today, and I love it! I traumatically dislocated my patella in the O.R. 2 weeks ago. I was just using an ACE wrap for support and my knee was significantly improving until it suddenly swelled up again with a massive effusion overnight. I had my colleagues drain the effusion, and a subsequent MRI only demonstrated significant bone bruising consistent with my known patellar dislocation. No ligaments were torn, but my patella needs some extra support as the bone bruising and residual effusion resolve. And, this brace is just perfect for my needs!!! (I am a 49-yr-old male orthopedic surgeon with no affiliation to Donjoy.)
    Pros: Comfortable, yet snug and supportive, allowing adequate range of motion. Affordable price for the degree of support and the quality of the materials.
    Cons: The posterior (backside) seam/stitching is irritating to the skin. I’m going to purchase an undersleeve to pair with it.
    Posted on January 7, 2020

    Great for athletes

    Reviewed by:
    Verified Purchase
    This is my daughters second Donjoy J Lateral brace. She wears it for Cheer and tumbling and it has helped with her knee pain and has helped keep her knee cap in place. So far her only complaint is the Velcro straps do irritate her other leg from rubbing. Also the shipping was faster than expected even during the holidays.
    Pros: Quality product
    Cons: Velcro straps irritate the opposite leg.
    Share Your Usage: Recovering from Injury, Sports, Preventing Injury, Chronic Instability
    Posted on January 22, 2018

    Very good brace!

    Reviewed by:
    Verified Purchase
    A little tight at beginning, however, the brace provides strong support for the knee.
    Pros: Strong support for the knee.
    Cons: A little tight
    Share Your Usage: Sports, Recently Injured, Daily Use, Recovering from Injury
    Posted on October 7, 2017


    Reviewed by:
    Verified Purchase
    This brace is the best I've ever owned, it's lived up to all my expectations. Anyone who has knee tracking problems get this brace.
    Pros: perfect fit outstanding stability total comfort
    Share Your Usage: Daily Use
    Posted on September 27, 2017

    Donjoy patella knee brace

    Reviewed by:
    Verified Purchase
    This is a wonderful knee brace. It supports the knee cap and keeps it stable. I had one previously. You cannot go wrong with this brace if you need to reduce the wear and tear of knee cap.
    Cons: Can be rather warm in climates that have high humidity
    Posted on August 8, 2017
    Reviewed by:
    Verified Purchase
    These were working wonderfully for about a week until the stitching started to come undone on the left brace. Not sure what I could have done differently to have prevented this from happening - was not being rough with them. For the price I expected better quality. I have RA and was planning on using them for a lot longer.
    Share Your Usage: Daily Use, Chronic Instability
    Posted on March 6, 2017

    Love this Item!

    Reviewed by:
    Verified Purchase
    I have both material versions of this brace and I like this one better. It "moves" less on my knee while playing volleyball and is much cooler. The neoprene really makes my leg sweat and this one does not.
    Pros: stays in place better than neoprene sweats less than neoprene version
    Cons: tighter fit than neoprene version, but I still wear the same size harder to get on and off than neoprene, but not impossible I still prefer it to the neoprene version
    Share Your Usage: Chronic Instability, Sports
    Posted on March 2, 2017

    Works okay

    Reviewed by:
    Verified Purchase
    It works okay but slides down
    Pros: Good support
    Cons: Slides down while wearing
    Share Your Usage: Recovering from Injury, Chronic Instability
    Posted on February 18, 2017

    Very good, excellent support and comfortable

    Reviewed by:
    Verified Purchase
    Knee hole could be a little bigger
    Posted on November 30, 2016

    Great knee brace for its price!

    Reviewed by:
    Verified Purchase
    I have been using this same style brace since I first dislocated my knee cap 8 years ago. I am pretty rough on it and it holds up well. I have no problems with my knee cap as long as I wear it. I really like the fabric because the brace stays up even when it gets wet. The seam up the back is uncomfortable at times, but it is one of the few braces that I can find in this price range that stays on while I am playing sports.
    Posted on December 4, 2015