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McDavid 421R Patella Knee Support w/ Stays

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McDavid 421R Patella Knee Support w/ Stays
(7 reviews)
McDavid Authorized


  • Features a padded buttress for patella knee support.
  • McDavid 421R features spiral stays to prevent the support from migrating down the knee. 

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Regular Price: $36.99

Price: $32.99

Regular Price: $36.99

Price: $32.99



19864 Sold

Availability: In stock



The McDavid Patella Knee Support w/ Stays 421 provides Level 2 support and relieves pain caused by symptoms of chondromalacia, patellar subluxation, and tendonitis. The McDavid 421 includes two spring steal stays on the medial-lateral sides of the knee to help enhance ligament support and relieve pain. The open patella design includes an oval padded buttress to help stabilize the patella, and adjustable straps on the top and bottom for added compression and to ensure a great fit. Made of latex-free neoprene, the support provides advanced protection, warmth and compression for athletics and everyday use.

McDavid Patella Knee Support w/ Stays Features:

  • Neoprene patella knee support with padded buttress design.
  • Two spring steal stays on medial-lateral sides for ligament support.
  • Open-patella in the front.
  • 3/16" thick 100% latex free neoprene with an outer nylon covering for greater durability.
  • Two circumferential straps on the top and bottom for additional compression and a snug fit.
  • Provides Level 2 support and protection.
  • Sizes: Small, Medium, Large, XLarge, 2XL - See our sizing chart tab above for important sizing guidelines.
  • Model: McDavid 421R.
  • Black.

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The #421R McDavid Patella Knee Support is often used to treat:

  • Patella tendonitis.
  • Knee strains.
  • Chondromalacia.

Sizing chart

Sizing Knee Chart:

Measure knee as instructed below for the correct size McDavid 421 support.

McDavid 421R Patella Knee Support


Features standard latex-free neoprene material and spring steel spiral stays on the sides.

Good Brace For Chondromalacia
I just bought another McDavid neoprene patella knee support with the spring steel stays on the sides to help my kneecap pain. I've had chondromalacia for about 15 years from bicycling and hiking so I've always had patella pain to deal with. This 421 is affordable and does a good job for the price. I purchased the size small and had to return it it for the size medium - the exchange was easy. Great company to deal with here
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Mcdavid 421 - Good patella support
The McDavid 421 is exactly what I was looking for in patella knee support. I've suffered from tendonitis for many years and found McDavid knee braces to be very high quality. I bought two of the McDavid 421R last year and wore them virtually 5-6 days a week. I found the large to be true to the sizing chart. The buttress does a good job of supporting the patella to reduce pain.
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Very Happy
This is the McDavid patella knee support that most of my buddies use in the gym and for basketball. The neoprene material is very good quality and the straps provide compression. My knee pain has improved at least 60% since using this device.
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For mild knee arthritis this brace works really well I got this McDavid neoprene patella knee support with spring steel stays on the sides to give me support with walking and it does a good job. It fit well and keeps my knee supported well. I got the large size and it was a perfect fit. Recommended.
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Sizing Not An Issue
The sizing was not an issue as some reviewers have mentioned.I got a small and the initial fit was excellent. The strap was easy to pull tight on the top and bottom. The McDavid 421 support is sufficient for a mild knee sprain that I had recently sufered.
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Mcdavid 521 - Five Stars
Worked as expected and advertised. Great product!
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Great Mcdavid patella knee support
After trying many different supports, I haven't found a better brace that gives me support with Tae Kwon Do and is as comfortable as this one. The other braces either slide down while sweating, they open up, or they just do not allow free leg movement. This mcdavid patella knee support provides me with excellent support for my knees. This is just a lot better than other knee pads I've used. You are're getting an excellent product with this one. I hope you benefit from it like I have.
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DME-Direct is a McDavid Authorized Dealer Site

McDavid believes that the best way for you to select and purchase a McDavid product is at one of its authorized online stores of which DME-Direct is one. Only in these stores can you be sure to find the latest McDavid collection and ensure you are getting a genuine McDavid product with the manufacturer's full warranty.

McDavid therefore recommends that you do not purchase a McDavid item through any website, unless it is an authorized McDavid dealer.

McDavid Authorized Dealer Site 

We are a McDavid Authorized Dealer and can assure you a safe and pleasant shopping experience here at our website as if you were at our wholesale distribution premises in Valencia, California.

Some non-authorized sites sell counterfeit, second-hand merchandise, and/or products containing old fabrics, glues, and resins that do not perform as intended, and are therefore, not eligible for care under the McDavid warranty. Others do not offer the original McDavid warranty, nor do they offer any after-sales service of any kind.

McDavid takes great care to ensure that all McDavid authorized dealers offer you the very best products and service. Please take advantage of the peace of mind that only they can offer to McDavid Sports purchasers.

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