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DonJoy

SERF Strap

Rating:
80% of 100
5   Reviews Add Your Review

Attention Medicare Patients

A revolutionary approach to help relieve and manage patellofemoral pain.
In stock
SKU
11-154X-X
Special Price $125.29 Regular Price $178.99
On Sale 30% Off Save $53.70

Price Match Guarantee

If you happen to find a lower price anywhere on an identical item, just show us the price and we will match it!

BetterBraces.com works hard to bring you low prices. If you have found a better price for this item, at another authorized dealer, we will match it - Guaranteed! In order for us to match the price please email a link of the competitor's website to Service@Donjoystore.com and we'll confirm their price is lower. We'll then contact you with further instructions. This is not an automated process, but we will respond as quickly as possible. If you need a more immediate response, please call 1-800-553-6019.

Price Match Guarantee Terms and Conditions

This guarantee does not apply to shipping charges. If the competitor limits quantities we reserve the right to do so as well, and if the offer is footnoted by "while supplies last", we reserve the right to confirm that the competitor still has the item in stock. Our Price Match Guarantee does not apply to competitor's bonus offers, Ebay auctions, free offers, auction websites, non-retail(wholesale) websites, private sales, special orders, typographical errors, clearance sales, liquidation sales, mail-in rebate offers, or where a service commitment is included in the transaction.

Internet competitor offers must include shipping and handling charges as the basis for comparison. Additionally, we must be able to verify that it is the exact same product in brand-new condition.

Price match guarantee does not apply to non web-based stores.
Price matching is subject to providing proof of the manufacturer's part number and availability of the product. (i.e., current dated advertisement, register receipt, copy of webpage or catalog page) of a lower price, plus your original receipt to claim your refund for previous purchases. The terms of this guarantee are subject to change without notice.

Why are online bracing products less expensive than the ones purchased in a physician office?

When you purchase your brace online, there are certain services and benefits that you won’t receive. Services that you will receive from your medical professional in the office but not from your online retailer may include:

  • assessing your medical condition to determine the most appropriate brace
  • measuring you to determine the appropriate brace size
  • assessing brace fit
  • billing your insurance company for the brace
  • in person brace return or exchange if necessary

Comparing the cost of a device online vs. the cost of the same device provided in a medical professional’s office is not a valid comparison. As the consumer, you have to decide what is right for you and consider the trade-offs. Sure, online products tend to be less expensive – but you also lose the important services and benefits outlined above. Please make your decision carefully and, when in doubt, consult your medical provider and insurance company.

Shipping & Delivery

Orders will be shipped within 1 business day for in-stock merchandise purchased before noon pacific time Monday to Friday. Orders made on Saturday or Sunday will be shipped the following Monday ex. Public Holidays. If a product is out of stock customer will be contacted with an updated ETA, an alternate item, or offer of a refund. Shipping charges are calculated based on the weight of the products you are purchasing and your delivery address. You can view the shipping costs for the products you want to purchase by adding them to your cart and proceeding to the checkout page.

Shipping rates are calculated based on the weight of the items in your shopping cart. Delivery dates are determined based on the zipcode of your shipping address.

We ship all products to APO/FPO addresses with the exception of Compex Units. Only Compex accessories are shipped to APO/FPO addresses.

**Overnight shipping is not a guarantee for PO BOX or APO addresses.**

Standard overnight is delivery by 3pm; 8pm for residential addresses.
Priority overnight is delivery by noon; 3pm for residential addresses.

Moneyback Guarantee

Quite simply, we want your purchase to work for you. Our no-risk, unconditional 30-Day Money Back Guarantee allows you ample time to see if your investment in your health is doing the job you expect and deserve. If, after trying the product, you are not completely satisfied, you may exchange the item or return the product for a refund of the full purchase price (minus shipping & handling) within 30 days of the purchase. Be advised the return must be received in our warehouse prior to the end of the 30 days for your refund to be processed. Please note: The DonJoy Defiance Custom Knee Brace does not qualify for the 30 Day Money Back Guarantee because it is custom made.

View Full Return Policy

Is the SERF Strap right for me?

Ideal for those suffering with patellofemoral or anterior knee pain resulting from excessive hip internal rotation, adduction, and/or knee valgus. May use when running or performing other sports. Try our Brace Advisor for personalized product recommendations to meet your needs!

An Approach to Managing Patellofemoral Pain

Developed in conjunction with Dr. Christopher Powers at the University of Southern California, the S.E.R.F. Strap™ is the FIRST patellofemoral brace designed to help alleviate patellofemoral pain stemming from abnormal hip motion(s). The S.E.R.F. Strap™ utilizes a unique 3-point hip-leg anchor to help alleviate patellofemoral pain caused by excessive hip internal rotation, adduction, and/or knee valgus. Made of thin Breathe-O-Prene®, the S.E.R.F. Strap™ is lightweight, breathable, and designed to be worn underneath clothing. The S.E.R.F. Strap™ can be used to control abnormal hip motion during leisure/sport activities and as a training tool in the clinic. The DonJoy S.E.R.F. Strap™…Ride the wave of change!


Traditional treatment of patellofemoral pain (PFP) has been based on the premise that abnormal patellar tracking and/or malalignment is the primary cause of symptoms. While this theory may hold true in some instances, it is not always the case. In fact, the true etiology of PFP remains somewhat controversial… until now.


Research conducted by Dr. Christopher Powers at the University of Southern California has suggested that abnormal patellar tracking may be the result of excessive internal rotation of the femur (i.e. the femur moving under the patella). 1dj Ortho has worked with Dr. Powers to create a brace that supports alignment of the hip. The S.E.R.F. Strap™ stabilizes the patellofemoral joint and reduces pain through external rotation of the femur.


The S.E.R.F Strap™ is the first patellofemoral brace designed to help alleviate PFP stemming from abnormal hip motion(s). If you suspect that your patient’s PFP is related to poor proximal control, the S.E.R.F Strap™ is the right choice. The S.E.R.F. Strap™ can be used to control abnormal hip motion during leisure/sport activities and can be used as a training tool in the clinic.


S. E. R. F. = Stability thru External Rotation of the Femur Indications

  • Patellofemoral or anterior knee pain resulting from excessive hip internal rotation, adduction, and/or knee valgus
  • Chronic lower extremity conditions resulting from abnormal hip motion(s) and/or poor proximal control

Features and Benefits:

  • 3-point hip-leg anchor reduces PFP by externally rotating the hip
  • Thin Breathe-O-Prene
  • Contoured design limits migration during activity
  • Re-Application markers for easy re-application and improved patient compliance
  • 6 month warranty

Instructions for Use

How to Put on the DonJoy SERF Strap - PDF
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See height-weight index chart below for sizing.

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